diseases of the eye
TRANSCRIPT
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Your eyes are one of the most complicated parts of your body
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In order to see, your eye focuses light onto the retina, converts this light into chemical signals, and
sends those signals to the brain.
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There is a lens in your eye that focuses the light onto the back of the eye
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The light then hits the retina which is covered in photoreceptors
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When stimulated, these photoreceptors undergo a chemical
change that sends an electrical signal to the brain.
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This is constantly happening without you even noticing!
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There are two types of photoreceptors- rods
and cones
Rods
Cones
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Cones help us see colors! This is easy to remember because cones
and color both start with “c”!
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Rods help us see the difference
between black and white.
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There is also a spot on your retina with no rods or cones
called the “optic disk”
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The optic disk is often called a blind spot.
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There is also a point in your eye known as the “fovea”
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The fovea is a point in the middle of the
retina tightly packed with photoreceptors
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When light is focused on the fovea, we get the sharpest image!
When light misses the fovea When light hits the fovea
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Today, we will be looking at
what happens when your eyes don’t
work the way they are
supposed to
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A common eye disease is called “retinitis pigmentosa” or “RP” for short
Normal View View with RP
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RP causes your photoreceptors to stop working.
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Usually, RP starts by first degrading your rods (which detect light)
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Later, RP will affect your cones (which detect color).
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We will be using math today to study a patient’s retina to see the
effect of RP over time
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We will also use math to see if a certain treatment can slow down the progression of RP.
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Have fun!