Dear Editor: Just when I thought the Record's coverage of science and medicine couldn't get any worse, it printed a truly egregious and irresponsible endorsement of iridology on Aug. 28, The Eyes Have It. This therapy -- based on the belief that many illnesses can be diagnosed by examining patterns in the iris -- is not science, but pure quackery. It has repeatedly failed scientific testing. For example, in 1979 the leading U.S. iridologist and two others failed a test in which they were asked to distinguish between 48 persons with kidney impairments and 95 without. One iridologist concluded that 74% of the sick patients were normal. Another said 88% of the normal patients were sick. The Quackwatch site on the Internet -- www.quackwatch.com -- contains valuable information on iridology and many other therapies. It should be required reading for anyone interested in "alternative" medicine -- not to mention for reporters. Jeffrey Shallit