refractive
Bending light's path
Refractive describes the bending of light or other waves as they pass from one medium to another.
A lens has a refractive index that determines how sharply it bends light.
Refractive errors in the eye—nearsightedness, farsightedness—occur when the cornea or lens fails to focus light properly on the retina.
Light-splitting optical element
- spectrumContinuous range of values
- dispersionScattering across space
- indexAlphabetical guide to contents
- wavelengthSpatial repetition interval
angle · deviation · light · ray · beam · medium · incidence · interface
Blurry distance vision
- hyperopiaDifficulty seeing nearby objects
- astigmatismIrregular corneal curvature disorder
- presbyopiaAge-related near vision loss
- diopterUnit of focal power
correction · eyeglasses · glasses · prescription · optometrist · ophthalmologist · cornea · nearsightedness
Strong transparent synthetic polymer
- bifocalLens with two focal lengths
- trifocalLens with three focal lengths
- progressiveFavoring reform and innovation
- photochromicChanges shade with light
antireflective · focal · coating · spherical · cylindrical
prism
Light-splitting optical element
- spectrumContinuous range of values
- dispersionScattering across space
- indexAlphabetical guide to contents
wavelength · angle · deviation · light · ray · beam · medium · incidence · interface · glass
myopia
Blurry distance vision
- hyperopiaDifficulty seeing nearby objects
- astigmatismIrregular corneal curvature disorder
- presbyopiaAge-related near vision loss
diopter · correction · eyeglasses · glasses · prescription · optometrist · ophthalmologist · cornea · nearsightedness · farsightedness
polycarbonate
Strong transparent synthetic polymer
- bifocalLens with two focal lengths
- trifocalLens with three focal lengths
- progressiveFavoring reform and innovation
photochromic · antireflective · focal · coating · spherical · cylindrical
- sheenluster, shine, gloss, sheen, gleam
- gem qualitiesbrilliance, sparkle, luster, clarity, radiance
- rock texturescoarse-grained, fine-grained, grainy, gritty, massive
refractivereflective
Casting back light
absorptive · opaque · transmissive · diffusive · scattering
- double refractionLight splits into two paths
- light refractionBending of waves through media
- refracting telescopeLens-based astronomical instrument
- refractive errorOptical focusing abnormality