Vista Center Health Library

We are part of Vista Center for the Blind and Visually Impaired, and we provide information and resources to help people with vision loss understand their conditions, keep about new treatments or research findings, and a questions about their health.




Photoreceptors Special cells in the eye’s retina that are responsible for converting light into signals that are sent to the brain. Photoreceptors give us our color vision and night vision. There are two types of photoreceptor cells: rods and cones. Read more:

Diabetic Eye Disease

Diabetic eye disease is a term for several eye problems that can all result from diabetes. Diabetic eye disease includes: diabetic retinopathy, diabetic macular edema, cataract, and glaucoma. 

Sildenafil for Treatment of Choroidal Ischemia

The hypothesis of this study is to determine if there is a benefit afforded by the use of systemic Sildenafil to patients with choroidal and retinal degenerations and dystrophies, such as vitelliform degeneration, dry and reticular age-related macular degeneration (AMD) as well as patients with hereditary and acquired retinal dystrophies such as retinitis pigmentosa and central serous retinopathy. 

Age-Related Macular Degeneration 

Age-Related Macular Degeneration What Is Age-Related Macular Degeneration? Age-related macular degeneration (AMD) is a problem with your retina, the light-sensing nerve tissue at the back of the eye.  It happens when the centermost part of the retina, called the macula, is damaged. With AMD you lose your central vision. You cannot see fine details, whether you are looking at […]

Deadly bacteria in recalled eyedrops can spread person-to-person

Deadly bacteria in recalled eyedrops can spread person-to-person Deadly bacteria in recalled eyedrops can spread person-to-person: The New York Times report that scientists are concerned that the once rare treatment-resistant bacteria found in the recalled eyedrops can spread person-to-person and poses a risk of establishing itself as a recurrent problem in the U. S. In […]