Drug addiction is a disease that characterized by compulsion, desire to take different substances permanently or for certain period of time. Numerous negative incidents, such as crimes, work accidents and traffic accidents, are related using illegal substances. Therefore, urine drug cassette tests have become screening tool. However, considering legal consequences test result, the question aris...

PURPOSE The Mars Letter Contrast Sensitivity Test (initially known as the Lighthouse Letter Contrast Sensitivity Test) is similar in design to the Pelli-Robson Test but may offer several advantages. This study evaluates the repeatability of the Mars test and its agreement with the Pelli-Robson test in normal and low-vision subjects. METHODS Fifty-four subjects were tested (age 22-86 years), i...