The eye doctor will ask questions about your overall health and family's medical history. You should tell the doctor if you have noticed any eye problems. The doctor checks your vision (visual acuity) using a chart of random letters of different sizes. This is called the Snellen chart. To see inside your eye, the doctor looks through a magnifying glass that has a light on the end (an ophthalmoscope). The device allows the doctor to see the retina, fundus (back of the eye), retinal vessels, and optic nerve head (optic disc). Sometimes, you'll be given eye drops so that the doctor can better view the back of the eye. Another magnifying device called a slit lamp is used to see the clear surface of the eye (cornea). Different machines and methods test your eye's reaction to light, eye movement, and peripheral vision. To see if you need glasses, the doctor places several lenses in front of your eye, one at a time, and asks you when the letters on the Snellen chart are easier to see. Color blindness is tested using multicolored dots that form numbers. (See: Color vision test) The doctor checks for glaucoma using a method called tonometry. | 
General Eye Care
