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.
Call your doctor at once if you have: 1  blurred vision, tunnel vision, eye pain, or seeing halos around lights; 2  shortness of breath (even with mild exertion), swelling, rapid weight gain; 3  severe depression, changes in personality, unusual thoughts or behavior; 4  new or unusual pain in an arm or leg or in your back;