Question 1

can you tell me about external (on the outer part of the eye) blepharitis?

Accepted Answer

Eyelid inflammation: Blepharitis is an inflammation of the glands of the eyelid which cause reddening of the eyelids. Warm compreses twice a day and massage of the eyelids will help.

Question 2

what does each part of the eye do?

Accepted Answer

Parts of the eye: Cornea - lets light in and focuses light.
Iris/pupil - controls how much light reaches the posterior segment.
Lens - focuses light and helps the eye to focus on things at near (up close).
Retina - captures light.
Optic nerve - collects light information from the the retina and sends to the brain for processing.

Question 3

what does it mean when the white part of the eye is brownish?

Accepted Answer

Depends which part: Brown areas on the eye can be benign or suspicious for malignancy.  Any new dark or brown areas of the eye should be examined by your eye doctor.

Question 4

which part of the eye focuses light on the retina?

Accepted Answer

Cornea and lens: The entire front part of the eye serves to transmit light through to the retina.  The cornea and lens serve to focus the light onto the retina, specifically the macula and fovea.

Question 5

what does a brown spot on my white part of the eye mean?

Accepted Answer

Brown eyespots: Most spots on the whites of the eyes are due to pigmentary cells from embryonic development which produce such spots.  These are common, have a much higher incidence in darker pigmented races, and are mostly benign.  Rarely a spot might be a melanoma - watch for growth, discomfort and redness as clues to this.

Question 6

rods and cones are usually found in what part of the eye?

Accepted Answer

Light perception: The retina has 10 layers and the bottom layer is made up of the rods-that perceive light and dark and movement, and the cones-that perceive color.  Cones are mainly in our center vision and rods in the side vision.  Light hits the rods and cones (called photoreceptors) and they convert the light signals into electro-chemical signals that are transmitted to the brain.

Question 7

which part of the eye is damaged when you have tunnel vision?

Accepted Answer

This is from retina: Advanced retinal degenerative disease like retinitis pigmentosa creates the disabling tunneling of vision.  Advanced glaucoma and diabetic change can also do this.  Certain types of optic nerve trauma and disease can also lead to tunneling.

Question 8

what might the light brown spot on my baby's white part of the eye be?

Accepted Answer

Depends: It could simply be an area of increased pigmentation, like a freckle. I would recommend having your child examined by a pediatric ophthalmologist to be sure.

Question 9

how does the white part of the eye heal when it's been scratched and bleeding?

Accepted Answer

usually well ; fast: The white part of the eyeball, or 'sclera, ' and is covered by a transparent mucous membrane, 'conjunctiva.'  when there is a small injury to this area form scratching, it usually heals well and fast on it's own. If there is even a remote chance that the eye wall was penetrated or cut deep, then it is very important to get an ophthalmologist to examine the eye. It may be more serious than it seems.

Question 10

what part of the eye or the brain decides which eye is dominant?

Accepted Answer

Occipital lobes: Vision comes from the occipital lobes of the brain.  If one eye is closed or not working during early childhood then dominance is controlled by the neural network in the occipital lobe.

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The outer part of the eye consists of the

A member asked:

Can you tell me about external (on the outer part of the eye) blepharitis?

A member asked:

What does each part of the eye do?

A member asked:

What does it mean when the white part of the eye is brownish?

A member asked:

Which part of the eye focuses light on the retina?

A member asked:

What does a brown spot on my white part of the eye mean?

A member asked:

Rods and cones are usually found in what part of the eye?

A member asked:

Which part of the eye is damaged when you have tunnel vision?

A member asked:

What might the light brown spot on my baby's white part of the eye be?

A member asked:

How does the white part of the eye heal when it's been scratched and bleeding?

A member asked:

What part of the eye or the brain decides which eye is dominant?

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