What is the retina? - ANSWERthe light-sensitive tissue in the back of the eye
the sensory membrane that lines most of the posterior chamber of the eye
What does one layer of the retina contain?
What does this layer function as? - ANSWERrods and cones
functions as the intermediate instrume...
What is the retina? - ANSWERthe light-sensitive tissue in the back of the eye
the sensory membrane that lines most of the posterior chamber of the eye
What does one layer of the retina contain?
What does this layer function as? - ANSWERrods and cones
functions as the intermediate instrument of vision by receiving the image formed by the lens and
converting it into chemical and nervous signals which reach the brain by way of the optic nerve
What is the macula? - ANSWERthe part of the retina that is responsible for your central vision,
allowing you to see fine details clearly
What is the optic nerve? - ANSWERthe largest sensory nerve of the eye
transmits impulses to the brain from the retina
What is the choroid? - ANSWERthe pigmented vascular layer of the eyeball between the retina and
the sclera
What are rods and cones? - ANSWERphotoreceptors contained in the retina
What are rods responsible for? - ANSWERperipheral and night vision
contain only one type of light-sensitive pigment
What are cones responsible for? - ANSWERthe ability to see during the day, in color and in detail
What is age-related macular degeneration (AMD)? - ANSWERdeterioration or breakdown of the eye's
macula
What is the most common type of AMD?
What percentage of people with AMD have this type?
What occurs with this type? - ANSWERDry AMD
, 90%
There is a breakdown or thinning of the layer of retinal pigment epithelial cells (RPE) in the macula
What happens?
Who is at risk and how often should they receive a comprehensive dilated eye exam? -
ANSWERWhen blood vessels in the retina change
Sometimes these vessels swell and leak fluid or even close off completely
Fluid can leak into the macula and cause macular edema.
In other cases, abnormal new blood vessels grow on the surface of the retina.
All people with diabetes; at least once a year
What are floaters? - ANSWERsmall specks or clouds moving in your field of vision
What are flashes? - ANSWERflashing lights or lightning streaks that occur when the vitreous gel pulls
on the retina
When is it common to see flashers and floaters? - ANSWERwhen the vitreous gel pulls away from the
retina as we age
What is a macular hole?
How does this occur?
What do these cause?
What are these usually related to? - ANSWERA small break in the macula
As we age, the vitreous shrinks and pulls away from the retina. If the vitreous is firmly attached to
the retina as it pulls away, it can cause the retina to tear and create a macular hole.
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