Two smaller groups 6M to 1.5M for repetitive testing (20/40, 6/12 to 20/10, 6/3 equiv.).
CAT.NO. 914 Small Illuminator Cabinet is necessary with these low contrast charts.
Among other applications, visual contrast sensitivity is used after LASIK surgery. The testing of contrast sensitivity after surgery helps the surgeon to pin point exact contrast levels. Contrast sensitivity coupled with acuity testing leads to better recordings of LASIK improvements. A thorough pre and post testing by the doctor will lead to better outcomes of LASIK and other vision surgeries, and ultimately better vision for the patient.