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A spherical [[lens]] in it's simplest form is the magnifying glass. This lens is convex on both sides, and those faces are shaped like sections of spheres. The strength of the lens is described in [[diopters]] A spherical lens that is convex on both sides is a "plus" lens, and is used to treat [[hyperopia]]. The next type of spherical lens to know is the simple minus lens, which is concave on both faces, and is used to treat [[myopia]]. Most [[opticians]] produce minus lenses that are actually concave on one side and convex on the other, but have a net minus power. | |||
==References | Spherical power is the easiest to reduce when adjusting your [[lens selections]]. You can use a [[cm measurement]] [[duochrome]] or [[Snellen Chart]] test to determine when you're ready to reduce power. | ||
=See Also= | |||
* [[cylinder]] | |||
=References= | |||
{{reflist}} | {{reflist}} | ||
[[Category:Articles]] | [[Category:Articles]] | ||