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Treating Problems with Eye (Laser Eye Surgery (This changes how strongly…
Treating Problems with Eye
Glasses
Convex Lens
Can be used to to treat short-sightedness
Causes the light instead of focusing before retina to focus on retina
They spread out the light rays
Concave Lens
Can be used to treat long-sightedness
Causes the light instead of focusing after retina to focus on retina
The bring the light rays closer together
Contact Lenses
More convenient that glasses for some activities like sport
Two main types of hard lenses and soft lenses
Popular because of lightweight and almost invisible
Soft lenses more confortable, but have higher risk of infection
Contact lenses are thin lenses that sit on the surface of the eye and are shaped to compensate for the fault in focusing
Laser Eye Surgery
This changes how strongly it refracts light into the eye
Slimming it down makes it less powerful and can improve short sight
A laser can be used to vaporise tissue changing the shape of the cornea
Bad eyesight can sometimes be corrected with laser eye surgery
Changing shape so that it's more powerful can improve long sight
Surgeon can precisely control how much tissue laser takes off
Risk of complications such as infection or the eye reacting in a way that makes your vision worse than before
Replacement Lens Surgery
Has higher risk than laser eye surgery
Includes possible damage to the retina which could lead to loss of sight
Natural lens of they eye is removed and an artificial lens made of clear plastic
Sometimes long-sightedness may be more effectively treated by replacing the lens of the eye