Difference between revisions of Eyeballs
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m (→Back-of-the-envelope calculations: just link to the optics-related math page, rather than repeating the thin lens equation) |
(→Parts of the eye: add macula and fovea) |
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* '''Retina''' - the tissue that supports the rods and cones. | * '''Retina''' - the tissue that supports the rods and cones. | ||
** '''Macula''' - a small area of the retina with a higher density of light receptors. | |||
** '''Fovea''' - a tiny pit in the macula with the highest density of cones, for highest resolution vision. | |||
* '''Choroid''' - the structure behind the sclera. It can change thickness (on a timescale of days) to make small adjustments to the [[axial length]] | * '''Choroid''' - the structure behind the sclera. It can change thickness (on a timescale of days) to make small adjustments to the [[axial length]] | ||
* '''Vitreous humor''' is the clear gel filling the majority of the eyeball. It is where true [[floaters]] live. This gel is important for helping the eye hold its shape and maintain the correct pressures inside the eye even when air pressure changes. In adults, the gel has a complex structure, with different thicknesses in different parts. | * '''Vitreous humor''' is the clear gel filling the majority of the eyeball. It is where true [[floaters]] live. This gel is important for helping the eye hold its shape and maintain the correct pressures inside the eye even when air pressure changes. In adults, the gel has a complex structure, with different thicknesses in different parts. | ||