What Is The Function Of The Sclera

The white part of the eyeball is technically the sclera. The sclera is what forms the supportive wall of the eyeball, and it’s continuous with the cornea.

Covered by conjunctiva, this transparent mucous membrane is designed to aid in lubricating the eye. Thicker nearer the optic nerve, its job is to protect. There are three distinct divisions to the sclera: episclera which is the loose connective tissue just beneath the conjunctiva; the sclera proper which is the dense white portion of tissue that gives it the color; and finally, the lamina fusca which is the innermost zone that is comprised of elastic fibers.

There are a few abnormalities that are associated with the actual sclera.

A few of these are genetic and may include the following:

  1. Melanosis: This is an excess of melanin or pigment on the surface of the sclera. This can become inflamed and may be very uncomfortable.
  2. Scleral Coloboma: This is when there is missing tissue that will result in notching or bulging of the sclera. This forms lesions.
  3. Ectasia: This is a thinning or bulging of the sclera.

Treatment may include state-of-the-art contact lenses which are fitted to help treat scleral ectasia.

The sclera is the portion of the eye that is referred to as the white. Forming the supportive wall, it is in continuity with the cornea, which is clear.

There are three distinct divisions to the sclera:

  1. Episclera: Loose connective tissues that are directly beneath the conjunctiva.
  2. Sclera Proper: This is the dense white tissue, which is what gives the area the color.
  3. Lamina Fusca: This is the innermost zone that is comprised of the elastic fibers.

There are a few different abnormalities possible. These are often genetic.

  1. Melanosis: Excessive melanin or pigment deposits. These may become inflamed and even uncomfortable.
  2. Scleral Coloboma: Notching or bulging may be due to missing tissue. These are lesions and may be painful.
  3. Scleral Coloboma:Missing tissue which is often treated with state-of-the-art contact lenses specifically designed for such treatment.

Other abnormalities may also include:

Ectasia which may be due to inflammation or trauma.

Episcleritis which may be a hypersensitivity reaction. Maybe anterior or posterior. May be characterized by engorged blood vessels. May affect the cornea.


Hi! My name is Ronald. Lifelong medical assistant to an ophthalmologist.
I'm excited to be able to combine my love of writing with my experience with the condition Anicteric Sclerae in order to help sufferers.
Although I have years of hands on experience and have lost many sleepless nights researching the condition, please do not take medical advice from the internet (even my site!). I urge you to seek professional medical opinions and advice as well as having a read through the online material available.

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