Which part of the eye is the sclera?
white
The white layer of the eye that covers most of the outside of the eyeball. Anatomy of the eye, showing the outside and inside of the eye including the eyelid, pupil, sclera, iris, cornea, lens, ciliary body, retina, choroid, vitreous humor, and optic nerve.
What is the function of sclera in an eye?
Sclera: This is commonly referred to as the white of the eye. It is fibrous and provides support for the eyeball, helping it keep its shape. Conjunctiva: A thin, transparent membrane that covers most of the white of the eye, and the inside of the eyelids. It helps lubricate the eye and protect it from microbes.
What is the sclera composed of?
collagen fibers
The sclera is the white outer coating of the eye. It is tough, fibrous tissue that extends from the cornea (the clear front section of the eye) to the optic nerve at the back of the eye. The sclera gives the eyeball its white color. The cornea and sclera are made of the same type of collagen fibers.
What is the sclera attached to?
Scleral anatomy The sclera comes to an end anteriorly where it attaches to the limbus of the cornea.
What should the sclera look like?
A healthy sclera should be white. If it becomes yellow or discolored, an underlying condition may be present.
What is blue sclera?
Blue sclera: a bluish coloration of the whites of the eyes. The blue color is caused by thinness and transparency of the collagen fibers of the sclera, allowing the veins in the underlying tissue to show through. Blue sclerae are characteristic of a number of conditions, particularly connective tissue disorders.
How long does it take for the sclera to heal?
It’s bright red. It’s caused by a scratch to the sclera. It’s a mild injury that will go away on its own over 2 weeks.
Is sclera vascular or avascular?
The sclera is relatively inactive metabolically and has only a limited blood supply. Some blood vessels pass through the sclera to other tissues, but the sclera itself is considered avascular (lacking blood vessels).
What is muddy sclera?
Muddy sclera (a normal variant) has a brownish color that is not to be confused with scleral icterus. To confirm the scleras are indeed muddy, have the patient look up and examine the inferior portion of the sclera. The portion that is not normally exposed will be whiter.
What causes GREY sclera?
Long-term use of certain medications can give your sclera a blue-gray tint. Certain antibiotics, such as minocycline used to treat rosacea and rheumatoid arthritis can produce this effect. Minocycline can also discolor the skin, ears, teeth, or fingernails, making them appear blue-gray.
What is the normal sclera color?
Blue sclera. As you would expect, this condition is when a normally white sclera has a somewhat blue color. Blue sclera is caused by a congenitally thinner-than-normal sclera or a thinning of the sclera from disease, which allows the color of the underlying choroidal tissue to show through it.
What is the basic anatomy of the eye?
Basic Eye Anatomy *. the dark center in the middle of the iris. The pupil determines how much light is let into the eye. It changes sizes to accommodate for the amount of light that is available.
What is the function of the sclera?
The sclera is one of the outermost layers of the eye that provides protection and prevents the entry of exogenous substances to the posterior ocular tissues. Permeability across sclera mainly depends on certain parameters of the permeating molecule, such as molecular radius, physicochemical properties and surface charge.