56
Líon torthaí a aimsíodh
Number of matches found
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Próiseas trína n-athraíonn an tsúil a cumhacht optúil le híomhá shoiléir (fócas) a choinneáil ar réad is cuma an réad a bheith níos faide uaithi nó níos giorra di.
Process by which the eye changes optical power to maintain a clear image (focus) on an object as its distance varies.
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measurement unit specifying the refractive power of a lens by representing the reciprocal of its focal length in metres, one dioptre being equivalent to the refractive power of a lens with a focal length of one metre
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point of a lens through which light rays will pass unrefracted
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Dathdhaille lena ngabhann aireachtáil laghdaithe ar an solas ag ceann dearg an speictrim.
A form of defective colour vision in which perception of light at the red end of the spectrum is reduced.
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Leagan neamhchoitianta den tríchómatacht aimhrialta lena ngabhann íogaireacht laghdaithe i leith gorm.
A rare form of anomalous trichromatism marked by a reduced sensitivity to blue.