This is an image to demonstrate visual 'crowding' and test peripheral vision. Ensure that the red dot in the centre of the image is at eye level and focus on it. While holding your focus on the red ...

This is an image to demonstrate visual 'crowding' and test peripheral vision. Ensure that the red dot in the centre of the image is at eye level and focus on it. While holding your focus on the red ...

An optical illusion is a visual phenomenon where our perception of an image differs from objective reality. This image is perceived as a geometric optical illusion. These optical illusions occur due ...

Peripheral vision is what you see beyond your direct line of sight. It helps provide a complete sense of your surroundings without moving your head. Jump to Key Takeaways. Within the eye, rods and ...

Tunnel vision refers to the loss of side vision. With tunnel vision, a person can only see what is directly in front of them. As such, their vision may appear as if they were peering down a narrow ...

Please provide your email address to receive an email when new articles are posted on . An internet-based contrast sensitivity measurement tool can help patients self-monitor vision at home, alerting ...