In 1917, Japanese doctor Shinobu Ishihara invented a test to detect colour-blindness, a condition that makes it difficult to perceive certain colours. The test consists of identifying the various ...
Bellevue, Nebraska, USA Info from Licensor: "I posted a TikTok video of gifting my boyfriend with outdoor Enchroma Sunglasses! He has been colorblind since birth and for the first time, at 23 years ...
Although visual acuity was reduced and visual fields were constricted, and the patient's memory was moderately impaired, these associated symptoms could not themselves be the cause of his unusual ...