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Doctor insights on: Iris Changes

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Can you tell me how the muscles of the iris change the size of the pupil?

Can you tell me how the muscles of the iris change the size of the pupil?

Radial: The iris muscles which respond to more and less light, are radial in position. The resting position is the normal size of the pupil in normal light and with less light, the muscles contract and open the pupil. Since they are radial (like the spokes on a bike), they open and close the iris in a circular pattern. Very clever mechanism. ...Read more

Iris (Definition)

The iris is a structure within the eye that helps reduce the amount of light that reaches the retina. The iris is known as the colored part of the eye, and can be blue, brown, or any color or combination of colors in between. The iris is the portion of the eye that ...Read more


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Could your iris color change when you age?

Could  your iris color change when you age?

Iris color : Yes. Aging causes some loss of iris pigment. Medications can also change the color. So can certain diseases and surgeries. ...Read more

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Does anyone know, after someone drowns does the pigment in the iris really change colors?

No really should not: Even after death what difference does it make if the iris color changes. ...Read more

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What could cause the whole sclera to turn red, and the iris to change color as well?

What could cause the whole sclera to turn red, and the iris to change color as well?

Red sclera: The red sclera is most likely a spontaneous subconjunctival hemorrhage which is inconsequential more often than not. Leave it alone and it will be absorbed in 10 days or so. The change in iris color is most likely an apparent change, due to the surrounding red. If however, there is true change in iris color you should have it checked by your ophthalmologist. ...Read more

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What can cause a change in iris color or depigmentation in the iris (trauma, physical damage) ?

See below: Iris color change can be from congenital changes, trauma, chronic inflammation inside the eye or from certain medications. Changes to the outer cornea such as edema can also give the appearance of a different eye color. ...Read more

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How to reduce melanin in iris?? Or how can change my eye color permanently ???

How to reduce melanin in iris?? Or how can change my eye color permanently ???

Can't : No. There is no elective medication to change eye color. In individuals affected by the disease glaucoma, a therapeutic agent used to lower eye pressure, called a prostaglandin analogue, has a side effect of changing iris color. If you need glasses to see well, you could discuss with an ophthalmologist wether contact lenses are right for you. These can be colored. ...Read more

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How can a traumatic eye injury cause a change in iris color?

Rarely: Trauma cause cause iris damage including a change in color but this is uncommon. ...Read more

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If you were to blow too hard when useing the frenzel maneuver to clear your ears could it cause damage to the eye resulting in a change in iris color?

If you were to blow too hard when useing the frenzel maneuver to clear your ears could it cause damage to the eye resulting in a change in iris color?

No: Your iris cannot change color that way! it is possible to pop a blood vessel in the white area though. This would cause a red spot there. ...Read more