What are retinal diseases? The retina, which lines the back of the eye, contains nerve cells that receive light. They translate it into electrical signals that travel to the brain via the optic nerve....

Argyll Robertson Pupil Loss of the pupillary reflex to direct light stimulation and conservation of the pupillary constriction which accompanies the convergence of the eyeballs and the accommodation of the lens. Specifically, Argyll Robertson...

Red Eyes Red eyes usually are caused by allergy, eye fatigue, over-wearing contact lenses or common eye infections such as pink eye (conjunctivitis). Redness of the eye is most often due to dilation or...

What is strabismus? A medical definition of strabismus by doctor Dr Thomas Balmitgère, specialist in ophthalmology. Strabismus is characterized by a lack of alignment and coordination of the eyes. Concretely, these “point” in different...

Hemianopsia Hemianopsia is decrease or loss of vision in half of the visual field in one or both eyes. Depending on the case, it can be considered unilateral or bilateral, lateral or altitudinal, homonymous...

Scleritis (Sclera is the white part of eyeball) eye diseases Scleritis is a severe and sometimes necrotizing inflammation that threatens vision involving the deep episclera and the sclera. Symptoms are moderate to severe pain,...

Eye Diseases Eye diseases can affect many anatomical structures: cornea, iris, lens, vitreous, retina, optic nerve… These diseases can be of infectious, inflammatory, metabolic, tumor, traumatic or degenerative origin. Let’s take a look at...

Presbyopia (Old Eyes) Presbyopia or old eye is an age-related loss of vision to see the surroundings clearly without suitable eyeglass correction. Presbyopia is not a disease, but the age-related loss of normal eyes...

Myopia Myopia is an eye condition in a person who cannot see objects at a far distance. It is corrected perfectly thanks to thinned glasses, if the myopia is medium or strong. This is...