Term
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Definition
| Disuse of the eye from certain defects. Such as cataracts, amblyopia |
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Term
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Definition
| Unequal refraction of the two eyes |
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Term
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Definition
| Where one eye is hyperopic, the other is myopic |
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Definition
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Definition
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Term
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Definition
| The inability of the eye to bring all the parallel rays to a focus at the same point |
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Term
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Definition
| For a lens, an imaginary line through the optical centers. With reference to cylinder, the meridian of weakest curve, or the meridian containing only sphere power |
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Term
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Definition
| A specified curve from which all other curves are computed from |
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Term
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Definition
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Term
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Definition
| Inflammation of the eyelids |
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Term
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Definition
| The optic disc. It marks the connection of the optic nerve to the retina |
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Term
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Definition
| The crystalline lens having lost its transparency |
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Term
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Definition
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Definition
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Definition
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Term
| Colmascope or Polariscope |
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Definition
| An instrument used to detect strain or stress in heat treated lenses |
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Term
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Definition
| A lens that contains both sphere and cylinder power |
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Term
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Definition
| The mucus membrane of the eye |
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Term
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Definition
| Proceeding towards a point |
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Term
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Definition
| The first refracting body of the eye (largest) |
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Term
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Definition
| The refracting body of the eye which gives the eye the power of accommodation |
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Term
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Definition
| A drug that induces paralysis of the ciliary muscle. (Dialates pupil) |
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Term
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Definition
| The movement of a lens so that the optical center and the geometric center do not coincide |
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Term
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Definition
| Turning aside or changing the direction of, as light being deviated by a prism |
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Term
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Definition
| The scattering of light rays |
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Term
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Definition
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Term
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Definition
| The separation of light into the component colors |
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Term
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Definition
| An instrument used to measure vertex distance |
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Term
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Definition
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Term
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Definition
| Normal eye, or no refractive error |
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Term
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Definition
| The tendency of the eye to turn inward |
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Term
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Definition
| A definite and apparent turning inward |
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Term
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Definition
| A tendency of the eye to turn outward |
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Term
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Definition
| A definite and apparent turning outward |
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Term
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Definition
| The most distant point at which an object may be clearly seen with accommodation at rest |
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Term
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Definition
| The reciprocal of the dioptric power. Distance from the optical center of the back surface of the lens and its principal focus |
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Term
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Definition
| High intra-ocular pressure |
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Term
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Definition
| Far sighted. In axial hyperopia, the power of the eye is to weak for the axial length of the eye |
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Term
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Definition
| Elevation of one visual axis over the other |
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Term
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Definition
| The tendency of one eye to turn upward |
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Term
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Definition
| The tendency of one eye to turn downward |
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Term
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Definition
| One visual axis being below the other |
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Term
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Definition
| A picture or conception of anything real |
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Term
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Definition
| The ratio of the speed of light in a given medium, as compared to the speed of light in air |
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Term
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Definition
| The membrane in the anterior part of the eye, that gives the eye its color and contains the pupil |
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Term
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Definition
| Both eyes being alike in their refraction (Same RX) |
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Term
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Definition
| The thinning portion of the retina, about 3 m/m in diameter, laying directly in the visual axis and containing the fovea |
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Term
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Definition
| One, of 360 degrees of the circumference |
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Term
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Definition
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Term
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Definition
| A drug that dilates the pupil |
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Term
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Definition
| Near-sighted. Whereas the crystalline lens is too strong for the axial length of the eye |
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Term
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Definition
| The nearest point at which the eye can see clearly when employing its full accommodation |
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Term
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Definition
| Method of determining power of a lens |
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Term
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Definition
| Short jerking movements of the eye |
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Term
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Definition
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Term
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Definition
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Term
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Definition
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Term
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Definition
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Term
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Definition
| Both eyes (also, oculus Unati) |
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Term
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Definition
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Term
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Definition
| That which pertains to the eye |
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Term
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Definition
| Instruments used to measure the radius of curvature of the cornea (keratometer) |
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Term
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Definition
| Instrument used to view the interior of the eye (Fundus) |
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Term
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Definition
| An imaginary straight, through the center of the cornea, pupil, crystalline lens, to the fovea (visual axis) |
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Term
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Definition
| The point of no prism in a lens |
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Term
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Definition
| Relating to the spectacle front, so as the top is further from the face than is the bottom |
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Term
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Definition
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Term
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Definition
| Intolerance to light (Extreme Sensitivity) |
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Term
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Definition
| The seeing of flashes of light |
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Term
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Definition
| An instrument used for determining the refractive errors of the eye |
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Term
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Definition
| Lack of accommodation of the crystalline lens |
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Term
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Definition
| The formula for lenses, required by a patient, as prescribed by the examiner |
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Term
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Definition
| A wedge-shaped piece of optical medium, having a base, apex and apical angle |
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Term
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Definition
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Term
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Definition
| A thickening of growth of the conjunctiva usually on the nasal side and extending outward toward the cornea |
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Term
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Definition
| A drooping of the upper eyelid |
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Term
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Definition
| The tilting of a spectacle front, so as the top is closer to the face that is the bottom |
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Term
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Definition
| The bouncing off of light that is incident upon a surface |
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Term
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Definition
| The bending of light rays, as they pass obliquely from one medium through another of different index of refraction |
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Term
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Definition
| The innermost layer of the posterior chamber of the eye, containing the macula |
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Term
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Definition
| The outermost layer of the eye. It protects and supports the eye, and its components |
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Term
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Definition
| The ADD, in all multifocal lenses |
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Term
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Definition
| A band of colors resembling a rainbow, produced by the dispersion of light |
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Term
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Definition
| Having equal powers in all meridians |
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Term
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Definition
| Bicentric grinding, to alleviate vertical imbalance at the reading level |
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Term
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Definition
| Cross-eyed (squint) (Walleye) any muscle imbalance |
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Term
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Definition
| Imperfections in glass, due to poor annealing |
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Term
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Definition
| Imperfections in glass, due to imperfections in mixing of ingredients |
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Term
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Definition
| Instrument used for measuring intra-ocular pressure |
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