1]  Conjunctivitis : It is inflammation of the conjunctival tissue.

2]  Glaucoma : It is due to raised intraocular pressure damaging the optic nerve head, causing defect in visual field.

3]  Corneal Ulcer : It is ulcer of the cornea. Types of ulcer - Bacterial, Fungal, Viral.

4]  Iritis : It is inflammation of iris. Types of iritis are acute, recurrent & chronic.

5]  Cataract : It is the condition when lens of the eye looses its transparency and becomes opacified. Hence light can not pass through the lense in required level.

6]  Refractive Errors : Normally light rays coming from an object fall on retina to form a image. If rays coming from object either fall in front or back of retina it is called as refractive error.

Types - a) Hypermetropia, b) Myopia, c) Astigmatism, d) Presbiopia

7] Trachoma : It is a chronic contagious disease caused by chlamydia group of viruses.

8]  Retinopathy : It is inflammation of retinal blood vessels. In these cases exudates & hemorrhages are seen in retina. 

9]  Squint : It is abnormal condition when one eye fixes at the object and the other eye turns in different direction.

10] Night Blindness : It is a condition where  Patient is getting difficulty  to see in the night.

11] Corneal Opacity :  It is a condition where corneal transparency is lost. It complete or partial.