#lenses

• Aberroscope — An optical instrument or diagnostic device historically used, or applied in biophysics experiments, for observing, visualizing, and qualitatively assessing spherical and chromatic aberrations of the eye or a lens system. The device typically employs a shaded micrometric grid (aberroscopic grid) through which a light beam passes, allowing the examiner or the patient to directly perceive geometric distortions on the retina or a projection screen.
• To steam up — To expose an object directly to the action of hot vapors or warm exhalations; to cover a surface (such as windows or lenses) with a fine, opaque layer of condensation. As an intransitive verb, it refers to the action of emitting or giving off steam, or to the gentle blowing of a breeze, suggesting a subtle fluid dynamic or a warm, intimate atmosphere.
• Anamorphic — Pertaining to anamorphosis or anamorphism, referring to them, or producing a controlled optical distortion. In cinematography and photographic art, it describes a special system of lenses or objectives (anamorphic lenses) that compress an image with a very wide field of view onto a standard sensor or film, with the image then being decompressed during projection to provide a spectacular widescreen format without losing the frame's original resolution.
• Astigmatic — The feminine form of the word 'astigmat'; a woman or female person suffering from astigmatism; as an adjective, it refers to a manifestation, an ocular anatomical structure, a lens, or an image affected by this refractive error or designed to treat it.
• Astigmatic — The feminine form of the word 'astigmatic'; it refers to a woman affected by astigmatism or to a manifestation, lens, or ocular structure displaying characteristics specific to this optical focusing aberration or used for its correction.