The Amsler grid tests the condition of the center of the retina or "macula". It is a good test for screening for the development of "wet" macular degeneration in patients with "dry" macular ...

Macular degeneration usually refers to the age-related degenerative changes in the retina that can result in loss of central vision. It is caused by abnormal blood vessel growth (a condition ...

This test could help. Using the key below, answer the questions based on how strongly you agree or disagree with the statement.

Over the years, I've used a variety of satellite phones and communicators during off-grid adventures. Sometimes, I rely on them to stay in touch with others, while at other times, they serve as a ...

After hours: March 24 at 7:48:42 PM EDT Loading Chart for NGG ...