narrowing of the peripheral visual field, known as tunnel vision, from the outside to the inside. This progressive narrowing of the tunnel vision usually precedes night blindness and the loss of visual acuity.

involving just a few letters may be affected. However, as the disease advances, this area becomes progressively larger. At a more advanced stage, the person affected may experience other symptoms. For example

Our eyesight is at its very best when we are young. As we age, our visual acuity deteriorates progressively as the elasticity of the eye lens decreases. However, this only becomes noticeable from the age

light (absorption) are sharply distinct from one another, whereby the mode of action has an angled progression. Which range of light waves is visible to the eye? The light which is visible to us has a wavelength