The human eye: is the most valuable and sensitive sense organ and it is a natural optical instrument. The important parts of the eye: Cornea, Iris, Pupil, Eye Lens, Retina.
Power of Accommodation: The ability of the eye to focus objects lying at different distances is called the power of accommodation of the eye.
Least Distance of Distinct Vision Near point: Near point or least distance of distinct vision is the point nearest to the eye at which an object is visible distinctly
The far point of the eye:
Far point of the eye is the maximum distance up to which the normal eye can see things clearly. It is infinity for a normal eye.
The twinkling of a star is due to atmospheric refraction of starlight.
Scattering of light:
When a beam of light falls on an atom, it causes the electron in the atom to vibrate. The vibrating electrons, in turn, re-emit light in all directions. This process is called scattering.
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magnification, It's definition, types, clinical uses, Uses in Optical instruments like microscopes, telescopes, Uses in Optical instruments like direct Ophthalmoscopes, indirect ophthalmoscopes and slit lamps, In low vision
The human eye is an organ that reacts to light in many circumstances. As a conscious sense organ, the human eye allows vision; rod and cone cells in the retina allow conscious light perception and vision, including color differentiation and the perception of depth. The human eye can distinguish about 10 million colors.
magnification, It's definition, types, clinical uses, Uses in Optical instruments like microscopes, telescopes, Uses in Optical instruments like direct Ophthalmoscopes, indirect ophthalmoscopes and slit lamps, In low vision
The human eye is an organ that reacts to light in many circumstances. As a conscious sense organ, the human eye allows vision; rod and cone cells in the retina allow conscious light perception and vision, including color differentiation and the perception of depth. The human eye can distinguish about 10 million colors.
Lensometer is used to ascertain the spherical, cylinder and axis of an ophthalmic lens. It is also used to locate the optical center and to determine the base direction and the amount of prism present.
The visual pathway/visual system is the part of central nervous system which gives organisms the ability to process visual detail , as well as enabling the formation of several non-image photo response functions.
It detects interprets information from visible light to build a representation of the surrounding environment .
The visual system carries out a number of complex tasks , including the reception of light and the formation of monocular representations; the buildup of a nuclear binocular perception from a pair of two dimensional projections ; the identification and categorization of visual objects ; assessing distances to and between objects and guiding body movements in relation to the objects seen.
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Lensometer is used to ascertain the spherical, cylinder and axis of an ophthalmic lens. It is also used to locate the optical center and to determine the base direction and the amount of prism present.
The visual pathway/visual system is the part of central nervous system which gives organisms the ability to process visual detail , as well as enabling the formation of several non-image photo response functions.
It detects interprets information from visible light to build a representation of the surrounding environment .
The visual system carries out a number of complex tasks , including the reception of light and the formation of monocular representations; the buildup of a nuclear binocular perception from a pair of two dimensional projections ; the identification and categorization of visual objects ; assessing distances to and between objects and guiding body movements in relation to the objects seen.
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040-64501777 / 65864777
7 Active Technology Solutions Pvt.Ltd. is an educational 3D digital content provider for K-12. We also customise the content as per your requirement for companies platform providers colleges etc . 7 Active driving force "The Joy of Happy Learning" -- is what makes difference from other digital content providers. We consider Student needs, Lecturer needs and College needs in designing the 3D & 2D Animated Video Lectures. We are carrying a huge 3D Digital Library ready to use.
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7 Active Technology Solutions Pvt.Ltd. is an educational 3D digital content provider for K-12. We also customise the content as per your requirement for companies platform providers colleges etc . 7 Active driving force "The Joy of Happy Learning" -- is what makes difference from other digital content providers. We consider Student needs, Lecturer needs and College needs in designing the 3D & 2D Animated Video Lectures. We are carrying a huge 3D Digital Library ready to use.
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7 Active Technology Solutions Pvt.Ltd. is an educational 3D digital content provider for K-12. We also customise the content as per your requirement for companies platform providers colleges etc . 7 Active driving force "The Joy of Happy Learning" -- is what makes difference from other digital content providers. We consider Student needs, Lecturer needs and College needs in designing the 3D & 2D Animated Video Lectures. We are carrying a huge 3D Digital Library ready to use.
The human eye is one of the most valuable and sensitive sense organs in the human body. It enables us to see the wonderful world and colours around us.
Structure of eye:
The human eye has the following main parts:
Cornea: It is the transparent spherical membrane covering the front of the eye. Light enters the eye through this membrane.
Crystalline lens: The eyes lens is a convex lens made of a transparent, soft and flexible material like a jelly made of proteins.
Iris: It is a dark muscular diaphragm between the cornea and the lens. It controls the size of the pupil. It is the colour of the iris that we call as the colour of the eye.
Pupil: It is a small hole between the iris through which light enters the eye. In dim light, it opens up completely due to expansion of iris muscles, but in bright light it becomes very small due to contraction of iris muscles.
Eye defects and lenses
The eye is considered normal, or emmetropic, if parallel light rays from distant objects are in sharp focus on the retina when the ciliary muscle is completely relaxed
The normal eye contracts its ciliary muscle to provide for accomodation.
When the eye cannot function properly, the light entering the eye is not brought into sharp focus on the retina.
The eyeball is a spherical structure having 2.5 diameters. Structurally, the eyeball has three layers:- sclerotic layer (outer layer); choroid (middle layer) and retina (inner layer).
Outermost layer contains sclera and cornea
Middle layer contains choroid, ciliary body and iris.
Innermost layer consists of retina
The eyeball is a spherical structure having 2.5 diameters. Structurally, the eyeball has three layers:- sclerotic layer (outer layer); choroid (middle layer) and retina (inner layer).
Focuses an image by refracting, or bending the light rays using cornea and the lens. At the yellow spot of retina an inverted image is formed. Most of the refraction of light occurs in cornea due to its curved surface.
This presentation includes the description of human eye - it's parts, defects of human eye and their correction methods, concept of power of accommodation of human eye and care of human eye.
The eye is composed of a series of lenses and spaces that give focus to images, just as a camera does. It is composed of the vitreous humor, aqueous humor, the crystalline lens, and the cornea, and each of these has its own refraction index (the average being 1.34, because of the content of these tissues).Functions
Pupil. Opens and closes in order to regulate and control the amount of light.
Iris. Controls light level similar to the aperture of a camera.
Sclera. Protects the outer coat.
Cornea. A thin membrane which provides 67% of the eye's focusing power.
Crystalline lens. ...
Conjunctive. ...
Aqueous humour.
Vitreous humour.
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7 Active Technology Solutions Pvt.Ltd. is an educational 3D digital content provider for K-12. We also customise the content as per your requirement for companies platform providers colleges etc . 7 Active driving force "The Joy of Happy Learning" -- is what makes difference from other digital content providers. We consider Student needs, Lecturer needs and College needs in designing the 3D & 2D Animated Video Lectures. We are carrying a huge 3D Digital Library ready to use.
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7 Active Technology Solutions Pvt.Ltd. is an educational 3D digital content provider for K-12. We also customise the content as per your requirement for companies platform providers colleges etc . 7 Active driving force "The Joy of Happy Learning" -- is what makes difference from other digital content providers. We consider Student needs, Lecturer needs and College needs in designing the 3D & 2D Animated Video Lectures. We are carrying a huge 3D Digital Library ready to use.
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7 Active Technology Solutions Pvt.Ltd. is an educational 3D digital content provider for K-12. We also customise the content as per your requirement for companies platform providers colleges etc . 7 Active driving force "The Joy of Happy Learning" -- is what makes difference from other digital content providers. We consider Student needs, Lecturer needs and College needs in designing the 3D & 2D Animated Video Lectures. We are carrying a huge 3D Digital Library ready to use.
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7 Active Technology Solutions Pvt.Ltd. is an educational 3D digital content provider for K-12. We also customise the content as per your requirement for companies platform providers colleges etc . 7 Active driving force "The Joy of Happy Learning" -- is what makes difference from other digital content providers. We consider Student needs, Lecturer needs and College needs in designing the 3D & 2D Animated Video Lectures. We are carrying a huge 3D Digital Library ready to use.
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7 Active Technology Solutions Pvt.Ltd. is an educational 3D digital content provider for K-12. We also customise the content as per your requirement for companies platform providers colleges etc . 7 Active driving force "The Joy of Happy Learning" -- is what makes difference from other digital content providers. We consider Student needs, Lecturer needs and College needs in designing the 3D & 2D Animated Video Lectures. We are carrying a huge 3D Digital Library ready to use.
VIRAL MENINGITIS
Viral meningitis is an infection usually affecting children under 5 years of age.
The virus causing the infection usually infects the meninges, which are the protective tissue coverings of the brain and spinal cord.
The meninges is made up of 3 distinct layers :
1. The Pia mater – which is the layer directly in contact with
the brain and spinal cord.
2. Arachnoid mater – which consists of spider web-like
extensions.
3. The Dura mater – which is the outermost and toughest
layer of the meninges.
Cerebrospinal fluid or CSF,which also protects the brain and spinal cord,flows between the meninges and the surface of the brain.
The most common causes of viral meningitis are :
1. The Mumps virus
2. The Measles virus
3. Enteroviruses
4. The Herpes virus
5. Japanese Encephalitis virus
The most common mechanism of transmission include :
1. Sneezing or Coughing
2. Faecal contamination
3. Bite from an infected insect (such as a mosquito)
After entering the body, the virus makes multiple copies of itself,and enters the bloodstream, eventually reaching the brain. Here, it crosses the blood brain barrier,to enter the CSF, ultimatley infecting the cells of the meninges.This causes an inflammation of the meninges,because of the body’s attempts to fight the infection.
Symptoms of viral meningitis in an infant or young child include :
1. Fever
2. Irritability
3. Loss of appetite
4. Decreased consciousness
Symptoms of viral meningitis in an older child or adult
include :
1. Fever
2. Headache
3. Neck stiffness
4. Photosensitivity
5. Decreased consciousness
6. Nausea or vomitting
In general,the symptoms of viral meningitis are less severe than what’s seen with bacterial meningitis.
Treatment for viral meningitis include :
1. Use of Acetaminophen/NSAIDs (for the fever & headache).
2. Acyclovir (if the meningitis is caused by the Herpes virus)
Besides supportive therapy, there is no specific
treatment for viral meningitis, which usually runs it
course within 2 weeks, if there are no complications.
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Model Attribute Check Company Auto PropertyCeline George
In Odoo, the multi-company feature allows you to manage multiple companies within a single Odoo database instance. Each company can have its own configurations while still sharing common resources such as products, customers, and suppliers.
Operation “Blue Star” is the only event in the history of Independent India where the state went into war with its own people. Even after about 40 years it is not clear if it was culmination of states anger over people of the region, a political game of power or start of dictatorial chapter in the democratic setup.
The people of Punjab felt alienated from main stream due to denial of their just demands during a long democratic struggle since independence. As it happen all over the word, it led to militant struggle with great loss of lives of military, police and civilian personnel. Killing of Indira Gandhi and massacre of innocent Sikhs in Delhi and other India cities was also associated with this movement.
Biological screening of herbal drugs: Introduction and Need for
Phyto-Pharmacological Screening, New Strategies for evaluating
Natural Products, In vitro evaluation techniques for Antioxidants, Antimicrobial and Anticancer drugs. In vivo evaluation techniques
for Anti-inflammatory, Antiulcer, Anticancer, Wound healing, Antidiabetic, Hepatoprotective, Cardio protective, Diuretics and
Antifertility, Toxicity studies as per OECD guidelines
Honest Reviews of Tim Han LMA Course Program.pptxtimhan337
Personal development courses are widely available today, with each one promising life-changing outcomes. Tim Han’s Life Mastery Achievers (LMA) Course has drawn a lot of interest. In addition to offering my frank assessment of Success Insider’s LMA Course, this piece examines the course’s effects via a variety of Tim Han LMA course reviews and Success Insider comments.
The French Revolution, which began in 1789, was a period of radical social and political upheaval in France. It marked the decline of absolute monarchies, the rise of secular and democratic republics, and the eventual rise of Napoleon Bonaparte. This revolutionary period is crucial in understanding the transition from feudalism to modernity in Europe.
For more information, visit-www.vavaclasses.com
Embracing GenAI - A Strategic ImperativePeter Windle
Artificial Intelligence (AI) technologies such as Generative AI, Image Generators and Large Language Models have had a dramatic impact on teaching, learning and assessment over the past 18 months. The most immediate threat AI posed was to Academic Integrity with Higher Education Institutes (HEIs) focusing their efforts on combating the use of GenAI in assessment. Guidelines were developed for staff and students, policies put in place too. Innovative educators have forged paths in the use of Generative AI for teaching, learning and assessments leading to pockets of transformation springing up across HEIs, often with little or no top-down guidance, support or direction.
This Gasta posits a strategic approach to integrating AI into HEIs to prepare staff, students and the curriculum for an evolving world and workplace. We will highlight the advantages of working with these technologies beyond the realm of teaching, learning and assessment by considering prompt engineering skills, industry impact, curriculum changes, and the need for staff upskilling. In contrast, not engaging strategically with Generative AI poses risks, including falling behind peers, missed opportunities and failing to ensure our graduates remain employable. The rapid evolution of AI technologies necessitates a proactive and strategic approach if we are to remain relevant.
A Strategic Approach: GenAI in EducationPeter Windle
Artificial Intelligence (AI) technologies such as Generative AI, Image Generators and Large Language Models have had a dramatic impact on teaching, learning and assessment over the past 18 months. The most immediate threat AI posed was to Academic Integrity with Higher Education Institutes (HEIs) focusing their efforts on combating the use of GenAI in assessment. Guidelines were developed for staff and students, policies put in place too. Innovative educators have forged paths in the use of Generative AI for teaching, learning and assessments leading to pockets of transformation springing up across HEIs, often with little or no top-down guidance, support or direction.
This Gasta posits a strategic approach to integrating AI into HEIs to prepare staff, students and the curriculum for an evolving world and workplace. We will highlight the advantages of working with these technologies beyond the realm of teaching, learning and assessment by considering prompt engineering skills, industry impact, curriculum changes, and the need for staff upskilling. In contrast, not engaging strategically with Generative AI poses risks, including falling behind peers, missed opportunities and failing to ensure our graduates remain employable. The rapid evolution of AI technologies necessitates a proactive and strategic approach if we are to remain relevant.
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This slides describes the basic concepts of ICT, basics of Email, Emerging Technology and Digital Initiatives in Education. This presentations aligns with the UGC Paper I syllabus.
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Amazing Human Eye
1.
2. Learning Objectives
The Human Eye
The Important Parts of The Eye
Power of Accommodation
Defects of vision and their correction
Myopia or Near-sightedness,
Hypermetropia or Farsightedness
Presbyopia
3. The Important Parts of The Eye
Cornea
Cornea: The front part of the eye is covered by transparent spherical
membrane called cornea.
4. The Important Parts of The Eye
Cornea
Iris
Iris: Just behind the cornea is a dark coloured muscular diaphragm
which has a small circular opening in the middle.
5. The Important Parts of The Eye
Cornea
Pupil
Iris
Pupil: Pupil is the small circular opening of iris. The pupil appears
black because no light is reflected from it.
6. The Important Parts of The Eye
Cornea
Pupil
Iris
Eye Lens
Eye Lens: The eye lens is a convex lens made of a transparent jelly like proteinaceous material.
7. The Important Parts of The Eye
Ciliary muscles
Cornea
Pupil
Iris
Eye Lens
Ciliary muscles: The eye lens is held in position by ciliary muscles.
The ciliary muscles help in changing the curvature and focal length of
the eye lens.
8. The Important Parts of The Eye
Ciliary muscles
Cornea
Pupil
Iris
Eye Lens
Retina
Retina: The inner back surface of the eye ball is called retina. It is a
semi-transparent membrane which is light sensitive and is equivalent to
the screen of a camera.
9. The Important Parts of The Eye
Ciliary muscles
Vitreous humour
Cornea
Pupil
Iris
Eye Lens
Retina
Vitreous humour: The space between the retina and eye lens is filled
with another fluid called vitreous humour.
10. The Important Parts of The Eye
Ciliary muscles
Vitreous humour
Cornea
Blind spot
Pupil
Optic Nerve
Iris
Eye Lens
Retina
Blind Spot: It is a spot at which the optic nerve enters the eye and is
insensitive to light and hence the name.
11. Power of Accommodation
Near object
Far object
Power of Accommodation: The ability of the eye to focus
objects lying at different distances is called the power of
accommodation of the eye.
12. Power of Accommodation
Ciliary muscles
Thin Eye Lens
Thick Eye Lens
When the ciliary muscles are
relaxed, the eye lens becomes
thin. Thus, its focal length
increases and we see the distant
objects clearly.
When the ciliary muscles are
contract, then the curvature of
the eye lens is increases and the
eye lens becomes thick. Thus, its
focal length decreases and we
see the nearby objects.
13. Power of Accommodation
Near Point of the Eye
Far Point of The Eye
25 cm
Near point or least distance of
distinct vision is the point nearest
to the eye at which an object is
visible distinctly.
Far point of the eye is the
maximum distance up to which
the normal eye can see things
clearly. It is infinity for a normal eye.
15. Myopia or Near-sightedness
Myopic Eye
Correction
Concave Lens
Myopia :The light from a
distant object arriving at
the eye lens may get
converged at a point in
front of the retina in the
vitreous body.
Correction for myopia:
To compensate this, we
interpose a concave lens
between the eye and the
object, with the diverging
effect desired to get the
image focused on the
retina.
16. Hypermetropia or Farsightedness
Hypermetropic Eye
Hypermetropia: If the
eye-lens focuses the
incoming light at a point
behind the retina, this
defect is called far
sightedness or
hypermetropia.
Correction
Convex Lens
Correction for
hypermetropic eye: A
convergent lens(convex
lens) is needed to
compensate for the defect
in vision.
17. Presbyopia
Presbyopia is a common type of vision disorder that occurs as you
age. It is often referred to as the aging eye condition. Presbyopia
results in the inability to focus up close, a problem associated with
refraction in the eye.
18. Cataract
Milky and Cloudy Eye
Cataract: The crystalline lens of people at old age becomes milky and
cloudy. This condition is called cataract. This causes partial or
complete loss of vision. It is possible to restore vision through a
cataract surgery.