Activity 1A: Anatomy of the Human Eye

Pass out the unlabeled line drawing of the eye to each student. Using the handout of the drawing have the students name the parts of the eye and label them on their picture. Ask the students to determine what the function is of each part of the eye. For each function, ask the students what vision problems might occur if there was a defect in each individual anatomic area.


Examples of Anatomic Sites, Associated Defects, and Visual Problems
Anatomic Site  Defect  Visual Problem  
Lens  Becomes cloudy or opacified (cataract)  Blurry or smudged vision 
Cornea  Scratched or abraded (usually from trauma)  Pain, tearing, and obstructed vision 
Extra-ocular muscles  Paralyzed  Double vision (diplopia) 
Pupil and iris  Paralyzed (this is what happens when an optometrist dilates the eye)  Trouble focusing (accommodation) 
Aqueous humor  Increased pressure (glaucoma)  Blind spots, that is, areas in visual field you can't see 
Retina  Tears or bleeds  Blurry or lost vision 
Macula  Degenerates Loss of central vision 



Anatomy, function, anatomical defect


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Activity Code: 
Unit Reference: 
Challenges and Changes: Sensitivity to Vision & Hearing Compromises
Lesson Reference: 
Lesson 1: Anatomy of the Human Eye