People who suffer from eye allergies will know the pain that it has attached to it. With an itchy and running eye, you nearly feel like your eyes are going to pop out anytime. Well, most obviously the feeling is nowhere near good. Not only does it cause discomfort and pain but it also leads the exterior of your eyes to swell.

Retina is a fine layer of nerve tissue. Retina is part of the central nervous system (CNS), and is the only portion of it that is visible from the outside. There are two types of photosensitive cells called Cones and Rods, which are about a 125 million in number, and are distributed all over retina non-uniformly.

Are your eyes allergic to certain elements? Well, this condition is common among many individuals. Eye allergies may be typically caused by allergens in the air or other reasons such as pet dander. Although, an eye allergy is not life threatening, it does cause a lot of discomfort and even disrupt your night’s sleep.

Epiphora is a term given to the condition when there is an involuntary overflow of tears without any possible reason. This medical condition is typically referred to as watery eyes and it usually occurs in infants, children under two years of age, and seniors over the age of 60. However, it may happen at any age and may be triggered by infections, allergies, and the like.

A stye, also called as hordeolum is a small painful lump that forms inside or outside the eyelid. It is actually abscess that is filled with pus. Stye is caused due to bacterial infection called staphylococcus, which is a kind of bacterial infection. Stye are one of the common eye infection.

Watery eyes are most common in infants and small children. While one of the most common causes of watery eyes in children could be blocked tear ducts, in adults this could be caused due to the eyelids getting sagged from the eyeballs and causing the tears to accumulate and release.

Retina, a continuation of the central nervous system (CNS), is the only part that is visible from outside. The retina is the organ of sight and is provided with special photosensitive cells called cones and rods. Cones can discern color and produce well-defined sharp color images. They work only in bright light.

Retina is the screen on the inner layer of eye on which the images are formed by the lens and what is projected on them. The eye is very similar in structure and function to a modern digital camera. Retina, a thin membrane in the eye, is full of nerve supply resting on a highly vascular layer.