The front of the eye - the cornea, pupil, and lens - is clear and allows light to pass through. The cornea and lens focus the light on the back of the eye - the retina. The retina is the "seeing" tissue, meaning it sends messages to the brain through the optic nerve that enables us to see.
What Is Legal Blindness?
20/20 vision is considered perfect. To be considered legally blind, a person's best eye's corrected visusal acuity is less than 20/200. Side vision narrowed to 20 degrees or less can also result in legal blindness. Being legally blind does not neccesarily mean that a person has no vision - some vision may still be helpful for everyday activities.
What Is The Difference Between An Ophthalmologist And An Optometrist?
Ophthalmologist:
Provides comprehensive eye care - medical, surgical, and optical
4 years of pre-medical studies
4 years of medical school
1 year of internship
3 years of medical/surgical training in eye care
Optometrist:
4 years at an accredited optometry college
Do not attend medical school
Can diagnose
Usually not licensed to complete surgical treatments
How Often Should I Have My Eyes Examined?
Child:
At Birth Before Being Discharged From Hospital
At 2, 4, and 6 Month Well-Child Exams
Yearly Beginning At Age 5
Adult:
Between Ages 20-39: Every 3-5 Years
Between Ages 40-65: Every 2-4 Years
Ages 65 and Older: Every 1-2 Years
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