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.
This is why glaucoma is sometimes called the âsilent thief of sight.â. Vision loss from glaucoma can make things look blurry around the edges. A type of glaucoma called âangle-closureâ or ânarrow-angleâ glaucoma can cause sudden symptoms, including: 1  Severe eye pain. 2  Headache. 3  Nausea and vomiting. 4  Halos around lights. 5  Vision loss, including sudden loss of side (peripheral) vision.