Disorders of the Visual System
by Sonali Jaisingh
1. Astigmatism
1.1. Symptoms
1.1.1. Difficulty seeing distant objects
1.2. Casual Factors
1.2.1. Uneven cornea shape
1.3. Traetment
1.3.1. Corrective lenses
2. Scotoma
2.1. Symptoms
2.1.1. regions of blindness in visual field
2.2. Casual factors
2.2.1. Stroke
2.2.2. Physical injury to visual cortex
2.3. Treatment
2.3.1. None
3. Prosopagnosia
3.1. Symptoms
3.1.1. Inability to recognize familiar faces
3.2. Casual factors
3.2.1. Damage to the fusiform gyrus
3.3. Treatment
3.3.1. None
4. Cataracts
4.1. Symptoms
4.1.1. Mild blockage of light to complete blindness
4.1.1.1. Treatments
4.1.2. Distortion of color vision
4.2. Casual Factors
4.2.1. Clouding of the lens
4.3. Treatment
4.3.1. Surgical removal of the lens
5. Myopia (nearsightedness)
5.1. Symptoms
5.1.1. Difficulty seeing distant objects
5.2. Casual factors
5.2.1. Elongation of the eyeball
5.3. Tratment
5.3.1. Corrective lenes
5.3.2. Laser surgury
6. Hyperopia (farsightedness)
6.1. Symptoms
6.1.1. Difficulty seeing close objects
6.1.2. reading
6.2. Casual factors
6.2.1. Shortening of the eyeball
6.3. Treatment
6.3.1. Corrective lenses