EYE DISEASES : COLOR BLINDNESS ABSOLUTE (ACHROMASIA) (ACHROMASIA) - etiology, pathogenesis, symptoms and course of, recognition, prediction and prevention
Almost always congenital anomaly. In rare, mostly atypical cases, occurs when makulit inflammatory or degenerative in nature.
Symptoms. Low visual acuity, photophobia, a complete inability to distinguish colors. Objectively evident, the peculiar appearance of the eyes, always narrowed, semi-closed, which gives patients with absolute color blindness characterized by a tired, sleepy look. If Ophthalmoscope at the bottom of the eye sometimes marked degenerative changes of character in the macular region. In most typical cases, no changes in the fundus to detect ophthalmoscopically fails.
For. In typical congenital absolute colour blindness anomaly is persistent.
Recognition is easily accomplished with the help of special tables (polychromatic tables Rabkin); suffering from absolute color blindness patients do not recognize, either explicitly or hidden signs of the tables. Often, in addition to the first control table, they can't see anything. The inability to completely disassemble the table Rabkin, if the patients visual acuity within one tenth makes the diagnosis absolute color blindness is almost undeniable. For control you can use the compilation of equations using the color of the top on the spectral apparatus.
In the congenital form of the absolute color blindness profilaktika and treatment impossible. When acquired absolute colour blindness - treatment caused these changes diseases of the retina.