abstract:One of five comprehensive instructional videos derived from the original Flash animation on the use of the Topcon lensmeter (vertometer). Produced by Dr Suzane Vassallo with La Trobe University.
Its survivability stats, printed around the lens, include waterproof to 14 meters (46 feet), shockproof to 2-meter (6.5-foot) drops, crush-proof to 100 kilograms (220 pounds) of force and cold-proof to -10 degrees Celsius (14 degrees Fahrenheit).