Parts of the eye
Diseases
definitions
testing
100

Colored part of the eye 

What is the Iris. 

100

Nearsightedness

What is myopia

100

OD

Oculus Dexter / Right eye

100

What does the top number mean in 20/20 vision

distance 

200

Opening where light flows through

What is the pupil

200

Farsightedness

What is hyperopia 
200

OS

oculus sinister/left eye

200

Used to check for hyperopia

Jaeger chart

300

Outermost layer of the eye

What is the sclera 

300

Blurred central vision

What is macular degeneration 

300

The ability to perceive and comprehend the sense of sight 

visual acuity 

300

What does the bottom number mean in 20/20 

height of characters 

400

Middle layer of the eye

What is the choroid 

400

cloudy area in lens of eye 

what is cataract

400

Used to test distant vision

snellen chart

400

used to test for color blindness

Ishihara method 

500

Innermost layer of the eye 

What is the retina

500

vision loss/blindness 

what is glaucoma 

500

blurry or distorted vision 

astigmatism 

500

Name three types of snellen charts

Pictures, letter, tumbling E