normal vision

Born with normal vision, Victoria developed an eyesight condition that gradually worsened throughout her teens.

Vitamin A is needed for normal vision.

Psychologists tested this static image on 50 people with normal vision, tracked their pupil dilation and published their findings last week.

In a study published last week, psychologists tested this illusion on 50 men and women with normal vision.

In a study published last week in the journal Frontiers in Human Neuroscience, psychologists tested this illusion on 50 men and women with normal vision, and, using an infrared eye tracker, found that the greater a participant’s response to the illusion, the stronger the pupil dilation response.