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.
There are many causes of blurred vision: 1  Use of atropine or other anticholinergics. 2  PresbyopiaâDifficulty focusing on objects that are close. 3  CataractsâCloudiness over the eye's lens, causing poor night-time vision, halos around lights, and sensitivity to glare.