Contact lens

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Miho Hirano uses contact lenses (CL) to correct her vision and over 15 million people also use CL. However, CL can damage the cornea if not cared for properly, which can lead to conditions like corneal ulceration, conjunctivitis, or the rare but dangerous Acanthamoeba keratitis. To prevent these issues, CL users should wash their hands, clean their lenses daily, wear them less than 12 hours, and get regular medical exams.

Wash your Clean CL
hands everyday

Use less than Medical Exam
12 hours

This document summarizes information about soft contact lens care systems and compliance. It discusses various care product ingredients like preservatives and unique features of different brands. It also covers FDA review processes, cases of microbial keratitis linked to lens use, biofilm formation, and acanthamoeba infections. The document notes that full patient compliance with lens care instructions is very rare, ranging from 8-92% non-compliance. Education materials emphasize proper handwashing, lens handling, case cleaning, and symptom monitoring.

Confocal microscope presentation

Mohd Zharif Mohd Nor

Confocal microscopy allows high-resolution imaging of the layers of the normal human cornea. It illuminates small spots across the cornea and synchronously images each spot, allowing visualization of individual layers without interference from other layers. The cornea consists of an epithelium containing superficial, wing and basal cells, anterior and posterior limiting laminae, stroma containing keratocytes, Descemet's membrane, and endothelium. Cell structures are clearly visible within each layer. The technique provides insights into normal corneal structure and aging changes.

Pediatric contact lens management

Mohd Zharif Mohd Nor

This document discusses pediatric contact lens management for infants. Key reasons for fitting contact lenses in infants include prevention of amblyopia from anisometropia, accommodative esotropia, high refractive error, or corneal distortion. Fitting contact lenses in infants requires preparation, a comprehensive case history, family involvement, and selection of an initial diagnostic lens based on the infant's expected corneal curvature, diameter, and refractive error. The fitting process involves case history, anterior segment examination, refraction, and over-refraction to account for the infant's inability to accommodate and rapid eye growth in the first 18 months. Frequent prescription changes are needed.

Soft Toric Contact Lens

Tahseen Jawaid

Soft toric contact lenses are used to correct astigmatism by having different powers in different meridians. They come in various types depending on the surface curvature (front toric, back toric, bitoric), material (hydrogel, silicone hydrogel), wearing schedule (disposable, extended wear), and color. Silicone hydrogel lenses allow for higher oxygen permeability. Toric lenses are suitable for astigmatism patients wanting colored lenses. Disposable lenses are worn daily to monthly while extended wear lenses can be worn continuously for up to 30 days. Soft toric lenses are indicated for astigmatism over 0.75D when spherical lenses are insufficient or rigid lenses not tolerated.

Cl complications

Nur Rabiha Mohd Noor

Pediatric contact lenses

Hossein Mirzaie

This document provides evidence for fitting children as young as 8 years old with contact lenses. Studies have shown that children ages 8-12 are not more challenging to fit than teenagers ages 13-17. Contact lenses have also been shown to significantly improve quality of life for both children and teens compared to eyeglasses. Corneal reshaping contact lenses can help slow the progression of myopia in children. The age to start fitting depends more on the child's ability and interest rather than their actual age. Potential benefits of fitting children include correcting refractive errors and amblyopia, as well as benefits for binocular vision development and appearance. Risks can be mitigated by ensuring a stable refractive error and compliance with lens care and replacement schedules.

Pseudophakic Bullous Keratopathy case

Noor Munirah Aab

Pediatric contact lens

Noor Munirah Aab

Contact lens wear can lead to corneal hypoxia due to the lens acting as a barrier to oxygen supply. Prolonged hypoxia causes changes to the tear film, epithelium, stroma, and endothelium. Symptoms include red eyes, irritation, tearing, and vision changes. Management involves discontinuing lens use, refitting with a higher oxygen permeability lens, or reducing hours of wear. Choosing a lens material with good wettability, oxygen permeability, and low deposition can reduce risks. Immune events like allergic conjunctivitis or mechanical issues like abrasions may also occur but can often be managed by changing lens parameters or care.

Contact lens complication

akimiabdullah

This document discusses several common complications that can arise from contact lens wear, including dry eye, papillary conjunctivitis, corneal abrasion, corneal hypoxia/edema, neovascularization, keratitis, and corneal ulcer. Dry eye is the most common problem and results from a lack of sufficient lubrication and moisture on the eye surface. Papillary conjunctivitis appears as localized swelling or papillae on the tarsal conjunctiva. Corneal abrasion is a scratch or staining on the cornea surface caused by a poorly fitted lens or lens deposits. Prolonged lens wear can lead to corneal hypoxia/edema from oxygen deprivation. Neovascularization is the growth of new blood

Biometry: Iol calculation

Noor Munirah Aab

Contact lens complication

Noor Munirah Aab

This document discusses various complications that can arise from contact lens wear, including dry eye, meibomian gland dysfunction, papillary conjunctivitis, neovascularization, corneal staining, acanthamoeba keratitis, endothelial polymegathism, and more. It provides details on the signs, symptoms, causes, diagnosis, and management of each complication. Poor compliance, inadequate lens-cornea relationship, insufficient oxygen transmissibility, and lens incompatibility can all contribute to the development of contact lens related complications if not properly cared for and maintained.

Contact Lenses Management in Pediatrics

Kaylie Ling

Contact lens

Prashant Patel

This document defines key terms related to contact lenses, including their materials and manufacturing processes. It discusses important optical considerations like the tear lens, correcting astigmatism, and presbyopia. Contact lens materials include PMMA, CAB, silicone acrylate, fluoropolymers, and HEMA hydrogels. Lenses are manufactured using processes like spin casting, lathe cutting, and cast molding. A thorough examination is required when fitting patients with contact lenses.

Medically necessary contacts

aarontwolf

This document provides information on medically necessary contact lenses including definitions, benefits, insurance plans, eligibility criteria, billing codes, and examples of how to determine diagnoses and appropriate billing for patients. It discusses criteria for medical necessity including conditions like keratoconus, irregular astigmatism, corneal disorders and transplants, and high ammetropia. Examples are provided of patients' exams and determining appropriate diagnoses and billing codes to use for medical insurance and vision plans. Reimbursement rates for different contact lens types and replacement schedules are also included.

Contact lens complication

Mohd Zharif Mohd Nor

This document discusses contact lens complications, which are classified as infectious such as keratitis or non-infectious such as dryness. Factors that contribute to complications include the lens material, care system, modality of wear, fitting, and physiological changes in the eye. Extended wear lenses carry a higher risk of complications compared to daily wear rigid lenses. Maintaining good lens hygiene and choosing lenses appropriate for an individual's lifestyle can help reduce risks.

Contact Lenses

Irina Kezik