Elk County Eye Clinic Johnsonburg Rd St. Marys PA 15857 Center for Advanced Eye Care Bradford, PA 16701 Eye Examination
Dr. Luis Washington Lu, Eye-MD, F.A.C.S. is a Medical Doctor and Medical Director at the Elk County Eye Clinic LASIK surgery Offices in St. Marys and Bradford Eye Glasses and Accessories Eye Care Resources Contact Elk County Eye Clinic
 
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Dr. Lu and the highly-trained staff at Elk County Eye Clinic
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Ophthalmic Freebie

Glaucoma accounts for 10% of blindness in the U.S. But because there often are no warning symptoms, half of the nearly 3 million Americans with glaucoma go undiagnosed until it is too late.

If you lack health insurance, you may be eligible for a free eye exam through the Eye Care America program of the Foundation of the American Academy of Ophthalmology.

To learn more, call:

1-800-391-3937 or go to:

www.eyecareamerica.org

  

Topics > Eye Movement Disorders > Vision Testing

 

Vision Testing

The vision of infants, preverbal children and certain adults is measured by a spatial frequency sweep VEP (visually evoked potential). During this test a patient watches a television screen filled with lines, the sizes of which are changed by computer. As the lines are reversed, the brain waves that are generated by vision are recorded until the widths of the lines are too small to be seen. After analyzing these waves, the computer provides highly accurate estimates of the patient's visual acuity.

 

Another type of VEP uses flashes instead of lines. This test is particularly helpful in determining which nystagmus patients have albinotic traits - those that occur in albino children - and whether the child has any potential for binocular vision.

 

Because children are always growing and developing, the Foerderer Center provides ongoing testing as the child's condition evolves. Children with eye movement disorders are monitored closely with repeat testing while they are young.

 

Vision Testing
Vision Testing

 

Visually Evoked Potential
Visually Evoked Potential