A woman was diagnosed with a brain tumor after she couldn’t read a single letter during her eye test. Gemma Hillier, 45, lost her dad, Rod, 73, in July 2018 after he was diagnosed with a ...

Optical illusions challenge the brain by presenting images that appear differently from reality, requiring the brain to interpret and make sense of conflicting visual information. This mental ...

Given below is an online test for visual acuity using the E Chart, a chart with the letter 'E' in different directions (up, down, right and left) and sizes. This E chart visual acuity or eye vision ...