| focal l. |
the distance between a lens and an object from which all rays of light are brought to a focus. Symbol f.
출처: www.mercksource.com/pp/us/cns/cns_health_library.j...
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| focal l., anterior |
a line whose direction is perpendicular to the meridian of greatest curvature of a refracting surface.
출처: www.mercksource.com/pp/us/cns/cns_health_library.j...
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| focal l., posterior |
a line whose direction is perpendicular to the meridian of least curvature of a refracting surface.
출처: www.mercksource.com/pp/us/cns/cns_health_library.j...
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