Priority on the following eye diseases according to the World Health Organization global VISION 2020 agenda * :

Cataract
Trachoma
Onchocerciasis (river blindness)
Childhood blindness
    - Vitamin A deficiency - Ophthalmia neonatorum - Rubella cataract
Refractive error and low vision
    - Myopia (short-sightedness) - Hyperopia (long-sightedness) - Presbyopia
    - Astigmatism (when the eye can sharply image a straight line lying only in one meridian)
Diabetic retinopathy
Glaucoma

Amblyopia
Conjunctivitis
    - Conjunctivitis, Infectious
Corneal Transplantation
Herpes Zoster Ophthalmicus
Hypertensive retinopathy
Laser technology
Macular Degeneration Age Related
Ocular manifestations of AIDS
Optic Neuropathy, Ischemic
Preseptal and Orbital Cellulitis
Retinal Detachment
Retinitis Pigmentosa
Retinoblastoma
Strabismus
Thyroid-associated ophthalmopathy
Uveitis
Wounds and Injuries

General prevention:
Computer vision syndrome
Nutrition and Sight
Solar exposure of the Eyes
Tobacco and Sight
Vision and Driving
Visual Acuity

* Sources: vision_2020 (www.who.int), www.vision-2020.org