Care & maintenance of soft contact lens
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its all about how to care & maintain soft contact lens and what are the complication if you don't maintain hygiene and the procedure of cleaning.
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1) Proper care and maintenance of RGP contact lenses involves regularly cleaning, rinsing, and disinfecting the lenses to remove deposits, decrease microbes, and increase wettability.
2) The care system typically includes a daily cleaner, rinsing solution, disinfecting solution, weekly protein remover, and rewetting drops if needed. Proper storage in a lens case is also important.
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This document discusses pupil distance (PD), which is the distance between the centers of the pupils. It provides information on measuring binocular PD, monocular PD, and near PD. Binocular PD is measured from one pupil to the other using a ruler. Monocular PD measures each eye individually. Near PD is needed for reading glasses and is measured at a closer distance. Accurate PD measurement is important for properly positioning lenses in prescription glasses.
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This ppt is based in the topic of contact lens fitting of the RGP type contact lens. this is one of my university assignment. i am currently the student of centurion university of technology and management located in odisha.
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Rigid gas permeable (RGP) contact lenses are rigid plastic lenses that transmit oxygen. They have inherent rigidity like PMMA but are semi-soft due to oxygen permeability. RGP lenses provide clearer vision than soft lenses, are more durable, and less expensive. However, they require an adaptation period and have a higher risk of dislodging than soft lenses. Key design features of RGP lenses include the back surface design, thickness, edge configuration, and diameter, which affect lens fit, movement, comfort, and vision. RGP lenses are used to correct astigmatism and presbyopia and for conditions like keratoconus.
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The document discusses two methods for measuring lens power: trial lens hand neutralization which uses linear or rotational motion of trial lenses to estimate power, and lensometry which uses a lensometer device to precisely measure power by neutralizing lenses against a standard lens. It provides details on how each method is performed and the components involved in lensometry measurements.
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This document describes various methods of illumination used with a slit lamp to examine different parts of the eye. Diffuse illumination allows for a general survey of the eye while optic section, parallelepiped, and retroillumination techniques are used to view specific structures like the cornea, lens, and vitreous in more detail. Different angles of illumination like tangential, conical beam, and oscillatory help observe surface textures, cells in the aqueous humor, and lens opacities. Precise illumination techniques are crucial for comprehensive eye exams.
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Eccentric fixation occurs when an amblyopic eye fixes on a point other than the fovea. It is important to diagnose as it impacts visual acuity and treatment. Eccentric fixation can be evaluated using several tests including the corneal light reflex test, ophthalmoscopy, after image transfer, and perimetry. Treatment may involve occlusion of the good eye combined with use of a red filter over the amblyopic eye to encourage central fixation. Careful monitoring of fixation behavior is important for guiding amblyopia treatment.
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This document discusses measuring and classifying accommodative convergence/accommodation (AC/A) ratios. It defines the AC/A ratio as the change in accommodative convergence per diopter of accommodation. Abnormal AC/A ratios can cause strabismus. There are several methods described for measuring the AC/A ratio clinically, including the heterophoria, gradient, and graphical methods. The document outlines treatments for different AC/A ratio abnormalities like convergence excess, convergence insufficiency, divergence excess, and divergence insufficiency.
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This document discusses prism therapy and the use of prisms in ophthalmology. It begins by defining what a prism is and its characteristics. It then discusses the different types of prisms used in ophthalmology, including dispersive, reflecting, and polarizing prisms. The document outlines the clinical uses of prisms, including for optical, diagnostic, and therapeutic purposes. It describes different classifications of clinical prism types and criteria for prescribing prisms.
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The refractive index is the ratio of the speed of light in a vacuum to the speed of light in a material. Materials with a higher refractive index bend light more and allow for thinner lenses. High index lenses have a refractive index greater than 1.49 for plastics and 1.523 for glass. They provide benefits like thinner and lighter lenses but also have disadvantages like increased chromatic aberration. Common materials used include lanthanum, titanium, and polyurethane.
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The document summarizes a case study of a 20-year-old male patient with left eye vision loss since childhood due to corneal scarring who was fitted for a prosthetic soft contact lens. Details are provided on the patient's history and examination, differential diagnosis, types and fitting criteria of prosthetic contact lenses, fitting of a medium brown type D prosthetic lens, and fitting assessment showing good coverage, centration, and movement. The plan is for the patient to be fitted with a single purecon prosthetic soft contact lens.
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1) Proper care and maintenance of RGP contact lenses involves regularly cleaning, rinsing, and disinfecting the lenses to remove deposits, decrease microbes, and increase wettability.
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care and maintenance of soft contact lenses
Proper care and maintenance of contact lenses through regular cleaning, disinfection, and compliance with lens care instructions is important to prevent deposits, maintain comfort and clear vision, and reduce the risk of infection; deposits can form from interactions between the lens and tear components and cause complications if not removed through proper cleaning and use of protein removal solutions. Compliance with lens care regimens is key to minimizing risks and maximizing the benefits of contact lens wear.
Contact Lens Deposits, Contact lens Aftercare, Overview of care and Maintenance
Conatct lens deposit
Any lens surface coating or lens matrix formation which is not flushed or rinsed from the lens by tears during blinking. In effect, anything that remains on the surface despite blinking is deposit.
Deposit Formation:
Tear protein(lysozyme) are attached to the lens
Tear evaporates and leave residue on the lens
After protein are deposited, other components of the tear film (such as mucin) may adhere to protein
Over time, Layers build up and structural changes take place(e.g. Denaturation)
Factors influencing lens deposition:
o Individual difference in tears
o Lens materials
o Care system
o Wearing schedule
o Environment
o Patient hygiene
Types of Deposits:
1. TEAR RELATED:
• Protein
• Lipid
• Jelly bumps
2. NON-TEAR RELATED:
• Fungi
• Lens discoloration
• Mercurial deposits
• Cigarette residues
• Surface combination
• Rust spots
1. Protein deposits:
• Are a semi-opaque or translucent film usually thin whitish and superficial
• Have a frosted glass appearance
• may cover lens surface partially or full
• Cause the lens surface to become hydrophobic
• Can crack and peel if thick
Factors favoring a buildup of protein on a contact lens:
• short BUT
• Ionic binding capacity
• Inadequate cleaning especially of the lens periphery
• Altered blinking
• Heat disinfection
• Tear deficiency or altered tear composition
• Chronic allergies and GPC
2. Lipid Deposits
• Appears as greasy, smooth, and shiny adherent films on both RGP and soft contact lenses
• Best observed between blinks
• Appears as a thick
• oily coating
Lipids involved includes:
• phospholipids,
• neutral fats,
• triglyceride,
• cholesterol,
• cholesterol esters,
• fatty acids
Origin: mainly from meibomian gland
Predisposing factors:
• Tear film quality
• Slow blink pattern
• Poor lens compliance
• Careless use of inappropriate cosmetics/lotions
3. Jelly Bumps
• Appear as a clump of raised translucent mulberry like deposits
• Typically form in inferior
• exposed portion of lens
• Occur more frequently in high water, ionic, EW lenses
Predisposing factors
• Quality of tear film
• Poor blinking
• Lens surface contamination
• Aphakia cleaning consequences
• Large and numerous jelly bumps lead to wearer discomfort
• Large deposits can cause the lens to attach to the upper lid so that each blink causes excessive lens movement
• When located within pupil zone-visual acuity can fluctuating
• Maya also cause mechanical irritation of tarsal conjunctiva
• In extreme case, may cause CLPC
4. Inorganic Deposits
• Calcium carbonate deposits
• Calcium phosphate deposits
Appearance:
• White crystalline specks
• Can be small or large
• Rough surface
• Penetrate lens surface if severs
5. Fungal Deposits
Appearance:
• Filamentary growth on and into lens
• Usually white, brown or black
Fungal formation
• Spores on lens surface from eye or environment
• Proliferates to large visible growth
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This document provides guidance on proper eye care. It defines eye care as cleaning one or both eyes using a prescribed solution to remove secretions and prevent infections. The purpose of eye care is to relieve pain, prevent infections and further injury, and allow for instillation of eyedrops. The nurse's responsibilities include assessing the patient, explaining the procedure, preparing necessary articles like saline and cotton swabs, gently cleaning each eye separately with sterile swabs from inner to outer corners, and providing aftercare such as installing medications if ordered.
CL-deposits.pptx
This document discusses contact lens deposits. It defines deposits as any surface coating or matrix that does not rinse off during blinking. Deposits are categorized by position (external or internal) and nature (organic or inorganic). Organic deposits include proteins and lipids from tears. Inorganic deposits include calcium salts and pigments. Environmental deposits come from sources like tap water or cosmetics. The document outlines how deposits form and their effects like discomfort, blurred vision, and increased risk of infection. It also describes different methods for removing protein, lipid, and other types of deposits from contact lenses.
Ophthalmic Products
Anatomy of eye and adrena, absorption of drug in the eye, classification of ophthalmic
products, safety consideration of ophthalmic products, formulation, vehicles and additives,
manufacturing consideration, environment, manufacturing techniques, quality control of
ophthalmic products, packaging of ophthalmic products.
Care of Ophthalmic lenses.pptx
The document discusses the proper cleaning procedure for ophthalmic lenses, which includes using water, lens wipes, microfiber cloth, and rubbing alcohol. The best cleaning option mentioned is to use a lens cleaner solution of isopropyl alcohol and a microfiber cloth.
Contact lenses troubleshooting
This document discusses common causes of contact lens discomfort and symptoms, as well as treatments. It notes that contact lens discomfort is usually easily remedied and outlines several potential causes like poor lens fit, dry eyes, allergies, and infections. It emphasizes the importance of proper contact lens care and hygiene to avoid issues and recommends seeing an optometrist if problems persist.
CONTACT LENS CARE & MAINTENCE
This document discusses guidelines for proper care and maintenance of contact lenses. It emphasizes that most contact lens complications are due to improper usage and non-compliance with care systems. It outlines the steps for daily cleaning, disinfecting, rinsing and storage of contact lenses using various solutions and techniques to maintain lens health and vision. Adhering to recommended cleaning and disinfection procedures is important for preventing infections and prolonging lens life.
Contact lens solutions
Contact lens solutions come in various types for different purposes such as multipurpose solutions, saline solutions, hydrogen peroxide based solutions, and daily cleaners. Multipurpose solutions can clean, rinse, disinfect and store lenses while saline solutions are for rinsing and storing. Popular brands of contact lens solutions include Aquasoft, Renu Fresh, Biotrue, and Opti-Free Replenish which clean lenses, remove deposits, and fight germs using ingredients like hyaluronan and disinfecting agents. The document discusses the components, purposes and functions of different contact lens solutions.
PPE's.pptx
Personal protective equipment such as gloves, masks, protective eyewear and protective clothing are important for infection control in dentistry. Proper handwashing, which includes washing hands before donning gloves and after removing gloves, is essential to reduce bacterial flora and prevent disease transmission. Different types of gloves, masks, eyewear and clothing provide protection for both dental staff and patients from contact with infectious materials. Personal protective equipment should be put on in a certain order and removed in the reverse order while washing hands in between to minimize contamination.
CARE AND MAINTAINANCE OF SOFT CONTACT LENS
1) Contact lenses must be disinfected after each use to destroy pathogens and prevent infection. There are two main disinfection methods: heat/thermal disinfection and chemical disinfection.
2) Heat disinfection involves heating lenses at 80°C for 10 minutes but can decrease lens life and degrade the polymer. It is not recommended for low water content lenses.
3) Lubricating drops are used with lenses to relieve dryness caused by various environmental factors. The preservatives in some drops can cause complications so recommended brands should be used.
OP & OT sterilisation during COVID Times
The document provides guidelines for ophthalmologists on safely conducting examinations and procedures during the COVID-19 pandemic. It recommends minimizing patient time in clinics, disinfecting equipment between patients, and using approved disinfecting agents like bleach and alcohol solutions. Specific guidance is given for cleaning optics, gonioscopy tips, visual field analyzers, and OCT machines to prevent transmission of viruses through contact with surfaces.
CARE AND MAINTANENCE OF SOFT CONTACT LENS.pptx
This ppt will explain in detail regarding the disinfection system including hydrogen peroxide system and other methods of care and maintenance of soft contact lens
Antiseptic soln.
This document discusses various antiseptic solutions and sterilization methods. It defines key terms like sepsis, asepsis, antisepsis, disinfection, and sterilization. It provides details on common antiseptic solutions like Lysol, Savlon, hydrogen peroxide, spirit, formalin solution, and povidone-iodine. It also discusses methods of sterilizing instruments, including pre-cleaning, sterilization processes like heat and chemicals, and aseptic storage.
Presentation1
This document discusses the importance of optometrists prescribing the right contact lens solution for each patient. It notes that there have been recalls of some contact lens solutions due to microbial infections. It explains that patients may choose a solution based only on price without guidance from their optometrist. The document outlines the two main types of contact lens care systems - multipurpose solutions and hydrogen peroxide-based systems. It provides details on some popular contact lens solutions and recommends optometrists write prescriptions for solutions to underscore their importance.
Opthalmic products
This document discusses ophthalmic preparations, which are sterile liquid or semi-solid preparations intended for application to the eye. It defines ophthalmic preparations and lists the main types, which include eye drops, eye lotions, eye ointments, eye suspensions, and contact lens solutions. It then discusses the key requirements for ophthalmic preparations, such as being free of foreign particles, having appropriate viscosity and tonicity, a suitable pH, and maintaining sterility. The document provides details on administering eye drops properly and packaging and caring for contact lenses and their solutions.
PPT Timeless Prodigy EYES_export EN.pdf
The document provides information about a new eye contour product line called The Global Eye Ritual. It includes The Eye Contour cream and The Eye Patch for targeted treatment of the eye area. Clinical trials showed the products reduced wrinkles by 42.6% in 28 days and improved eye bags and circles after only 14 days of use. The line will be launched as a premium product and marketed through displays, videos and a dedicated website to demonstrate its transformative anti-aging benefits for the eyes.
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Contact Lens Deposits, Contact lens Aftercare, Overview of care and Maintenance
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https://ashpc.eu/
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+
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27.82088
with a host spectroscopic redshift of
2.903
±
0.007
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�
(
�
−
�
)
∼
0.9
) despite a host galaxy with low-extinction and has a high Ca II velocity (
19
,
000
±
2
,
000
km/s) compared to the general population of SNe Ia. While these characteristics are consistent with some Ca-rich SNe Ia, particularly SN 2016hnk, SN 2023adsy is intrinsically brighter than the low-
�
Ca-rich population. Although such an object is too red for any low-
�
cosmological sample, we apply a fiducial standardization approach to SN 2023adsy and find that the SN 2023adsy luminosity distance measurement is in excellent agreement (
≲
1
�
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Λ
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�
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�
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Compound A
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Compound B
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Compound C
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Products
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Direct Seeded Rice - Climate Smart Agriculture
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2:同时对留学生所学专业登记给予评定
3:国家专业人才认证中心颁发入库证书
4:这个认证书并且可以归档倒地方
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6:个人职称评审加20分
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8:在国家人才网主办的国家网络招聘大会中纳入资料，供国家高端企业选择人才
Candidate young stellar objects in the S-cluster: Kinematic analysis of a sub...
Context. The observation of several L-band emission sources in the S cluster has led to a rich discussion of their nature. However, a definitive answer to the classification of the dusty objects requires an explanation for the detection of compact Doppler-shifted Brγ emission. The ionized hydrogen in combination with the observation of mid-infrared L-band continuum emission suggests that most of these sources are embedded in a dusty envelope. These embedded sources are part of the S-cluster, and their relationship to the S-stars is still under debate. To date, the question of the origin of these two populations has been vague, although all explanations favor migration processes for the individual cluster members. Aims. This work revisits the S-cluster and its dusty members orbiting the supermassive black hole SgrA* on bound Keplerian orbits from a kinematic perspective. The aim is to explore the Keplerian parameters for patterns that might imply a nonrandom distribution of the sample. Additionally, various analytical aspects are considered to address the nature of the dusty sources. Methods. Based on the photometric analysis, we estimated the individual H−K and K−L colors for the source sample and compared the results to known cluster members. The classification revealed a noticeable contrast between the S-stars and the dusty sources. To fit the flux-density distribution, we utilized the radiative transfer code HYPERION and implemented a young stellar object Class I model. We obtained the position angle from the Keplerian fit results; additionally, we analyzed the distribution of the inclinations and the longitudes of the ascending node. Results. The colors of the dusty sources suggest a stellar nature consistent with the spectral energy distribution in the near and midinfrared domains. Furthermore, the evaporation timescales of dusty and gaseous clumps in the vicinity of SgrA* are much shorter ( 2yr) than the epochs covered by the observations (≈15yr). In addition to the strong evidence for the stellar classification of the D-sources, we also find a clear disk-like pattern following the arrangements of S-stars proposed in the literature. Furthermore, we find a global intrinsic inclination for all dusty sources of 60 ± 20◦, implying a common formation process. Conclusions. The pattern of the dusty sources manifested in the distribution of the position angles, inclinations, and longitudes of the ascending node strongly suggests two different scenarios: the main-sequence stars and the dusty stellar S-cluster sources share a common formation history or migrated with a similar formation channel in the vicinity of SgrA*. Alternatively, the gravitational influence of SgrA* in combination with a massive perturber, such as a putative intermediate mass black hole in the IRS 13 cluster, forces the dusty objects and S-stars to follow a particular orbital arrangement. Key words. stars: black holes– stars: formation– Galaxy: center– galaxies: star formation
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Care & maintenance of soft contact lens
- 1. CARE & MAINTENANCE OF SOFT CONACT LENSES -ADITI VORA
- 2. INTRODUCTION • Care & maintenance is one of the most important aspects of contact lens wear. • It influences the success of contact lens wear and patients satisfaction with their lenses.
- 3. PURPOSE • To maintain comfort • Provide good vision • Maintain eye health • Maintain lens hydration and parameters stability • To prevent or reduce the risk of ocular infection/inflammation
- 4. THE NEED OF LENS CARE SOLUTION • Cleaning - It removes microorganisms and loose debris and prepares lens for disinfection. • Rinsing - Removes the cleaner and debris after cleaning • Disinfection – Kills microorganisms, which may remain on the lens. • Weekly/protein cleaner – Removes firmly attached proteins from the lens surface. • Lubricating – Rewet the lens surface while the lens is being worn. • Lens storage case.
- 5. FUNCTION OF DIFFERENT SOLUTIONS • DAILY CLEANER : ✓loosely bounded foreign matter • cell debris • mucus, lipid, protei cosmetics ✓Majority of micro organisms 5
- 6. • RINSING SOLUTION: ✓ Toremove daily cleaners loosened deposits micro organisms ✓ Rinse lenses after over night storage 6
- 7. • TYPES ✓ Saline preserved unpreserved ✓ Multi purpose solution 7
- 8. • DISINFECTING SYSTEM / UNIT: ✓ Kill or deactive potentially pathogenic organisms including bacteria, fungi, viruses, amoeba. ✓ Maintain lens hydration • TYPES ✓ HEAT ✓ CHEMICAL oxidative cold chemicals
- 9. DISINFECTANT / PRESERVATIVE SENSITIVITY SYMPTOMS: ✓ Sudden decrease in dissatisfaction ✓ Decreased wearing time (3 – 4 hours) ✓ Burning , grittiness , dryness SIGNS: ✓ Conjunctival redness ✓ Epithelial damage ✓ Corneal inflammation
- 10. • PROTEIN REMOVER: ✓ Helps to remove or loosen tightly bound protein deposits • REWETTING / LUBRICATING SOLUTIONS: ✓ Toalleviate discomfort ✓ Rehydrate contact lens ✓ Flush debris
- 11. CHEMICAL PROPERTIES OF CARE PRODUCTS All lens care systems should: • Adequately perform cleaning, rinsing and disinfection • Be nontoxic and harmless to ocular tissues • Be compatible with lenses and cause no changes in parameters • Be simple to use • Be affordable.
- 12. OCULAR MICROORGANISMS In normal healthy individuals, the ocular defense system is very effective at preventing infections. Even though less than 1% of all contact lens wearers will develop even a minor infection, wearing contact lenses does increase the potential for infection by compromising the eye’s natural defense system. Effective, routine lens care will minimize this risk. In order for an infection to occur, microorganisms must invade and damage the ocular tissue. As compared to all of the microorganisms that exist, relatively few can cause ocular infections. The vast majority of ocular infection are caused by bacteria.
- 13. TYPES OF MICROORGANISMS • Bacteria • Fungi • Protozoa • Viruses
- 14. CONTACT LENS DEPOSITS Any lens surface coating or lens matrix formation which is not flushed or rinsed from the lens by the tears during blinking. In effect, anything that remains on the surface despite blinking is a deposit
- 15. TYPES OF CONTACT LENS DEPOSITS • Protein deposits • Lipid deposits • Mucin deposits • Enviromental deposits • Jelly bumps • Inorganic deposits • Fungi • Lens discoloration • Mercurial deposits • Cigarette residues • Rust spots
- 16. Jelly Bumps Lipid deposit
- 17. LENS MATERIAL • Lens material has a strong influence on lens deposits. Lens materials are categorized in four groups: • Lens material that is high in water content, and/or ionic, has a general tendency to deposit protein more than low water, and/or non ionic material. • Group IV lens materials deposit the most protein of all groups. Group Water content Charge I Low water content Non-ionic II High water content Non-ionic III Low water content Ionic IV High water content Ionic
- 18. PROCEDURE FOR CLEANING AND DISINFECTING ✓wash hands ✓Place lens in the palm of the hand ✓Place 2-3 drops of solution in the each surface of the lens ✓Rub with forefinger for about 15 seconds per side using a ‘to & fro’ and ‘L-R’ action. Rolling the forefinger in both directions cleans the lens periphery ✓Rinse well ✓Used weekly, after the daily cleaner and rinsing step ✓Lenses should be cleaned and rinsed again after enzyme cleaning
- 19. • CL should be stored in : ✓ a clean contact lens storage case ✓Fresh disinfecting solution • CARE OF LENS CASES: ✓Discard used solution ✓Scrub with a toothbrush and detergent weekly ✓Rinse with hot water ✓Air dry • Check the lens position before insertion
- 20. DAILY LENS CARE PROCEDURE
- 21. INSERTION & REMOVAL OF THE CONTACT LENSES • Lens insertion: ✓Place the wet, clean right lens on the tip of the index finger or middle finger of your dominant hand. Be sure the lens is correct side out. The edges should face upwards (bowl shape), and not outwards (boat shape). ✓Pull down the lower lid with the middle or ring finger of the same hand. Use your other hand to hold the upperlid (along with lashes) firmly open. ✓Look directly at the lens or into a mirror and place the lens directly on cornea ✓Release your lower lid first and the slowly release your upper lid. ✓Repeat the procedure for your other eye.
- 22. • Lens Removal: ✓Look up and pull the lower lid down with the middle finger of your dominant hand. ✓Place your index finger on the lower edge of your lens and slide the lens down to the white of your eye. ✓Squeeze the lens lightly between your finger and thumb and remove gently. ✓Repeat the procedure for the other eye. • Lens care instruction: ✓Rub : Place 3 drops of recommended multi purpose solution on each side of lens surface and gently rub for 10 seconds on each side. ✓Rinse: Thoroughly rinse each side of the lens for 5 seconds with the multi purpose solution. ✓Soak: Place the cleaned contact lens in the clean case and fill with fresh multi purpose solution solution. Soak the lenses in the solution for at least 4 hours. Remember to always use fresh solution and never reuse the solution.
- 23. MULTIPURPOSE SOLUTIONS Single bottle of solution for cleaning, rinsing, disinfecting and removing protein Advantages Simple, convenient, easy transport Enhanced safety due to lower toxicity a complications Does not cause protein denaturation Improved compliance Disadvantage Small incidence of mild sensitivity reaction
- 24. THE MESSAGE ◆ C lean ◆ R inse ◆ A nd ◆ D isinfect ◆ L enses ◆ E very time
- 25. SUMMARY • Ical- Module 5 • Contact lens primer – Monica Chaudhry • Bausch & Lomb Master Mind Module 5