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The Human Eye
Transcript of The Human Eye
The human eye contains rods which detect levels of light (dark versus bright)
It also has three kinds of cones which distinguish among the different colors.
If none of the cones are functioning, then a person has gray scale vision.
If the cones are semi-functional, then the person sees colors, but they are muted.
Different Types of Colour Blindness
The outer layer, formed by the cornea and sclera
The middle layer, holding the primary blood supply for the eye and containing the iris and pupil
The inner layer, comprised of the retina
Anterior chamber, between the cornea and iris
Posterior chamber, between the iris and the lens
Vitreous chamber, between the lens and the retina
What Is an Optical Illusion?
An optical illusion is an image that we observe differently compared to what it really is
They use color, light and patterns to create images that can be deceptive or misleading
Information gathered by the eye is processed by the brain, which creates a perception that in reality, does not match the true image.
Optical illusions occur because our brain is trying to interpret what we see and make sense of the world around us.
Elephant Illusion. 2006. Mighty Optical Illusions. By James Dean. Web. 14 May 2015.
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Blindness. N.d. Wikipedia. Web. 20 May 2015.
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Elephant Legs Illusion
Hermann Grid Illusion
Mother Father Daughter Illusion
Crawling Snakes Illusion
Rice Waves Illusion
Checker Shadow Illusion
Checker Shadow Illusion Continued
Blind people see nothing (black).
The blind have no visual light perception
Blindness can be caused by:
Genetics or can be caused by an issue that happens to a child before it is born
Diseases such as: Glaucoma and Cataracts
Glaucoma damages the eye's optic nerve
Pressure(fluid) increases inside of the eye
Colors that seem faded
Not being able to see well at night
Frequent prescription changes
New glasses, brighter lighting, anti-glare sunglasses, or magnifying lenses can help
Surgery that replaces cloudy lense with an artificial lense
No cure at the moment
Eye drops and surgery can be given to reduce symptoms and chances of going blind
The Human Eye
By: Rajdeep Sidhu
Society and The Human Eye (Blindness)
Relation To Society
Laser Eye Surgery
It is utilized in order to treat near and far sightedness, astigmatism, and treatment for cataracts.
Makes permanent changes to the cornea
Two types: LASIK and PRK
IS BLINDNESS GENETIC?
WHAT IS THE DIFFERENCE BETWEEN MYOPIA AND HYPEROPIA?
NAME ONE RISK INCLUDED IN LASER EYE SURGERY (LASIK OR PRK) BUT YOU HAVE TO MENTION WHICH ONE.
TRUE OR FALSE: RED-GREEN COLOUR BLIND PEOPLE ARE MORE ABLE TO FIND CAMOUFLAGED OBJECTS IN NATURAL SETTINGS.
WHAT LENS IS PLACED IN FRONT OF A HYPEROPIC EYE, WHICH HELPS THE RETINA CORRECTLY FOCUS?
WHAT LENS IS PLACED IN FRONT OF A MYOPIC EYE, WHICH HELPS THE RETINA CORRECTLY FOCUS?
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Human Eye and The Environment