The Tropic of Cancer and The Tropic of Capricorn. The Tropic of Cancer and the Tropic of Capricorn each lie at 23.5 degrees latitude. The Tropic of Cancer is located at 23.5Â° North of the equator and runs through Mexico, the Bahamas, Egypt, Saudi Arabia, India, and southern China.
Dr. Elliot Werner: Neither. Halos indicate something in the transparent structures of the eye that is interfering with the transmission of light back to the retina. The most common causes of halos are corneal edema (swelling), cataract, and high humidity in the air.
Congenital hypertrophy of the retinal pigmented epithelium (also known as halo nevus) is a pigmented, well demarcated dark spot inside the back of your eye on your retina. Though size varies, it is convenient to think of it as about equivalent to the top of an eraser on a pencil.