Since the 1970’s Precision Vision has built a reputation of producing the most accurate and most durable vision testing tools available. In the 1980’s we printed the first ETDRS cards and produced the standard ETDRS illuminatorcabinet. Since the 1990’s we have carried a variety of Low Vision and pediatric testing tools.This introduction, written by noted Vision Rehabilitation Researcher Dr. August Colenbrander, is meant to provide some guidance in selecting from the vast array of charts and devices available.It is divided into several sections:
A – Visual acuity
B – Letter chart measurements
C – Near Vision and Reading
D – Contrast Sensitivity
E – Low Vision tests
F – Pediatric tests
You may want to look like your favorite movie star or singer or have the perfect look for Halloween, but choosing to change the look of your eyes with contact lenses could cause a lot of damage to your eyesight.
Source: National Institutes for Health
About 2 million Americans age 50 and older have low vision due to AMD, a leading cause of vision loss. Millions more have early-stage AMD. The condition damages the macula, a spot near the center of the retina. As the disease progresses, it can cause a growing blurred area near the center of vision.
Education and behavior have a greater impact on the development of nearsightedness than do genetic factors: With each school year completed, a person becomes more nearsighted.
You may want to look like your favorite movie star or singer or have the perfect look for Halloween, but choosing to change the look of your eyes with contact lenses could cause a lot of damage to your eyesight.