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  • Title: Color vison deficiency among medical students: an unnoticed problem.
    Author: Pramanik T, Sherpa MT, Shrestha R.
    Journal: Nepal Med Coll J; 2010 Jun; 12(2):81-3. PubMed ID: 21222402.
    Abstract:
    Color vision deficiency, most of the time remains an unnoticed problem; although it is not very rare. The faculty of appreciation of color is essential for our smooth daily activities. Unfortunately, even many doctors do not know the severity of their color vision deficiency and tend to assume it as slight, and a few, as in the general population, do not know about their disability. Some common difficulties reported by medical practitioners and medical students were in recognizing- widespread body color changes (pallor, cyanosis, jaundice, rashes, erythema of skin), colorful charts, slides, test-strips for blood and urine, body products: blood or bile in urine, faeces, sputum, vomit, microscopy, mouth and throat conditions, impressions presented in the Ishihara chart, titration end-points, tissue identification (surgery) etc. The present study was undertaken to evaluate the presence of congenital color vision deficiencies among the medical students. The study was carried out among the 1st and 2nd year medical students of Nepal Medical College and Teaching Hospital (n= 120) with the help of Ishihara chart, that was shown to all participants. They were asked to read the impressions in the color chart. The impression perceived by a person with normal color vision was different from the impression perceived by a person with color vision deficiency. It was noted that, among the study population (n=120) 5.83% of the volunteers were color weak. Amongst the color-deficient volunteers, 57.0% were protanopic while 43.0% were deuteranopic. Medical students must be made aware of their congenital color vision deficiency and its effects on their work. Screening will enable the student and later the doctor to become aware of limitations in their powers of observation and devise ways of overcoming them; the patient will be protected from harm and litigation may be avoided when doctors have adapted their practice to their deficiency. Medical students and physicians must be screened for color vision deficiency and advised about it so they can take special care in clinical practice.
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