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.
Get emergency medical care if you have eye discomfort and redness accompanied by: Severe eye pain or irritation; Direct injury to the eye; Swelling in or around your eyes; Discharge of blood or pus from your eyes; Double vision or loss of vision; Sudden or new appearance of halos around lights; Nausea or vomiting; Sudden, severe headache