For general information about eye conditions such as nearsightedness, eye health conditions like diabetes, contact lenses, and LASIK we recommend starting at this site:
www.allaboutvision.com

Two medical reference sites Dr. Hogue uses are:

Medline Plus   www.nlm.nih.gov/medlineplus 
WebMD   www.webmd.com

For more specific eye health information:

Diabetes  
American Diabetic Association   www.diabetes.org

Macular Degeneration 
Association of Macular Diseases  www.macula.org./association/about.html

Glaucoma
Glaucoma Research Foundation   www.glaucoma.org

Contact Lens Sites
Johnson & Johnson (Acuvue)   www.jnjvision.com 
CooperVision   www.coopervision.com/main/lensmain.cfm

Spectacle Lens Sites
Transition Changeable Lenses   www.transitions.com 
Varilux Progressive No-line Bifocals  www.varilux.com 
Crizal Anti-reflection Coating   www.crizal.com