Vision disorders, illustration 插畫檔

Illustration of vision disorders. Top left shows normal vision. Top right shows short-sightedness, when light focuses before it reaches the back of the eye, so faraway things look blurry. Bottom right shows astigmatism, when light does not focus evenly on the back of the eye. Bottom left shows long-sightedness, when light from faraway things focuses behind the back of the eye instead of on it