Other types of eye conditions


Acanthamoeba is one of the most common organisms in the environment, but it rarely causes infections. When infection, called Acanthamoeba keratitis, does occur, it can threaten your vision. The best defense against Acanthamoeba keratitis infection is proper contact lens hygiene.

Accommodative Dysfunction   

An eye focusing problem resulting in blur up close and/or far away, frequently found in children or adults who have extended near work demand.

Anterior Uveitis 

Anterior uveitis is an inflammation of the middle layer of the eye. This middle layer includes the iris (colored part of the eye) and adjacent tissue (known as the ciliary body). If untreated, glaucoma, cataract or retinal edema can develop and cause permanent loss of vision. It usually responds well to treatment, but inflammation can recur.


A vision condition that causes blurred vision due either to the irregular shape of the cornea (the clear front cover of the eye) or sometimes the curvature of the lens inside the eye.

Colour Vision Deficiency

The inability to distinguish certain shades of coluor. The term “colour blindness” is also used to describe this visual condition, but very few people are completely colour blind.

Crossed Eyes       

Crossed eyes, or strabismus, is a condition in which both eyes do not look at the same place at the same time. It usually occurs in people who have poor eye muscle control or are very farsighted.

Floaters & Spots   

The shadowy images that appear in the field of vision caused by particles floating in the fluid that fills the inside of the eye.


An eye disorder causing progressive thinning and bulging of the cornea, the clear, front portion of the eye, resulting in high astigmatism and blurred vision that may need to be corrected with a specialty contact lens.

Lazy Eye (Amblyopia)

Amblyopia, also known as lazy eye, is the loss or lack of development of clear vision in one or both eyes. This can be caused by an eye turn (strabismus), a high prescription that has gone uncorrected with glasses or contacts, or an ocular structural abnormality. Eyeglasses or contact lenses can’t fully correct the reduced vision caused by lazy eye if vision was not developed within the critical period.


A vision condition in which the eyes make repetitive, uncontrolled movements, often resulting in reduced vision.


An age-related vision condition in which the eye gradually loses the ability to focus on near objects.

Retinal Detachment

A tearing or separation of the retina (the light-sensitive lining at the back of the eye) from the underlying tissue, possibly resulting in vision loss.

Retinitis Pigmentosa      

A group of inherited disorders of the retina (the light-sensitive lining at the back of the eye), which cause poor night vision and a progressive loss of side vision.


A rare type of eye cancer occurring in young children that develops in the retina, the light-sensitive lining at the back of the eye.

Subconjunctival Hemorrhage

An accumulation of blood underneath the conjunctiva, the clear membrane covering the white part of the eye.


Additional video resources


Detached Retina information

What is Retinitis Pigmentosa and how can NCBI help