photochromic lens pho·to·chro·mic lens (fō’tə-krō’mĭk)
A light-sensitive eyeglass lens that automatically darkens in sunlight and clears in reduced light.
[foh-tuh-kroh-mee] /ˈfoʊ təˌkroʊ mi/ noun 1. a former technique of color photography.
[foh-tuh-kron-uh-graf, -grahf] /ˌfoʊ təˈkrɒn əˌgræf, -ˌgrɑf/ noun 1. a device formerly used for taking a series of instantaneous photographs of a rapidly moving object. 2. a picture taken by such a device. 3. a in which the tracing or record is made by a pencil of light on a sensitized surface. 4. an instrument for […]
[foh-toh-koh-ag-yuh-ley-shuh n] /ˌfoʊ toʊ koʊˌæg yəˈleɪ ʃən/ noun 1. a surgical technique using an intense beam of light from a laser or a xenon-arc bulb to seal blood vessels or coagulate tissue, used primarily in ophthalmology to repair detached retinas or to treat certain kinds of retinopathy. photocoagulation pho·to·co·ag·u·la·tion (fō’tō-kō-āg’yə-lā’shən) n. Surgical coagulation of tissue […]
photocoagulator pho·to·co·ag·u·la·tor (fō’tō-kō-āg’yə-lā’tər) n. An apparatus used in photocoagulation.