(a) What are the intrinsic muscles of the eye? (b) What is their corresponding function? What is the function of the cornea? What role does the fovea centralis have in vision? In the eye, what provides black and white vision?
Eye allergies are mainly related to the conjunctiva. It is a tissue lining that covers the eyeball,it is rich in blood vessels. The conjunctiva is a thin membrane which keeps the front surface of the eye as well as the eyelids lubricated. It also protects the eye from harmful particles and...
The human eye region is made of many different bones for structure. Protection of the eyeball is done by a section called the orbit, otherwise known as theeye socket. An area called the periorbita surrounds the orbit. It can also be referred to as theperiosteum, but the term generally re...
The forced duction test is performed by attempting to move the eyeball in the direction of restricted movement. The ophthalmologist accomplishes this movement by anesthetizing the conjunctiva, holding it with forceps and simulating the natural movement of the extraocular muscles. If movement is induced...
What is the innermost layer and most delicate layer of the eyeball where photoreceptors are located? Structures of the Eye: The eyes are the major organ involved in the process of sight. There are many structures that function to support clear vision including those ...
What is refraction during an eye exam? The Lens of the Eye: The lens of the eye is the clear structure that is located behind the iris (colored portion of the eyeball). The lens functions to bend light rays so these rays will create a clear picture on the retina, which is located at...
Uveitis, which is inflammation of the tissue below the outer surface of the eyeball, is one of the leading causes of blindness around the world. Researchers from the University of Texas Medical Branch published the results of a study they conducted that demonstrated remarkable results with benfotiam...
There is a small indentation at the center of the optic disc, called the physiologic cup. This is where theoptic nerve, made up of over a million nerve fibers, connects to the retina. Optic disc function When light enters the eye through thelens, it hits the retina at the back of the...
Sore eyes are typically caused by irritation to the exposed portions of the eyeball. Know your cause and find the best treatments to relieve irritation. Sore eyes can affect people of all ages, genders and ethnicities. Typically, this symptom is felt in the conjunctiva, but it can be felt ...
Small, yellow-gray, raised bumps (called phlyctenules) appear at the limbus (the area where the conjunctiva attaches to the cornea), on the cornea, or on the