Nyctalopia

Nyctalopia eye disease
Night blindness

1. DEFINITION

2. ETIOLOGY

3. VITAMIN A DEFICIENCY Inhibits the production of rhodopsin(the eye pigment responsible for sensing low light situations) found in the retina composed of retinal(active form of retina) The decreased amount of rhodopsin in the eye implies that there is inadequate retinal to bind opsin. Therefore night blindness result.

4. RETINITIS PIGMENTOSA

5. TREATMENT Treat the underlying cause: The treatment method depends on the cause of the night blindness:  Vitamin A deficiency- treated by giving Vitamin A supplement  Retinitis pigmentosa-not completely curable but the rate of progression of this disease may reduced by intake of vitamin  A supplement and surgeries (retinal transplant)

6. TREATMENT CONT.

7. THANK YOU