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  2. List of Minolta A-mount lenses - Wikipedia

    en.wikipedia.org/wiki/List_of_Minolta_A-mount_lenses

    While the "(D)" designation is used on the box and in the documentation, the lenses just feature a "D" instead. Requires 8 lens contacts; lenses with only 5 contacts cannot support this feature. DT "Digital Technology", lenses for cameras with APS-C (or Super-35mm) size sensors, only. DT lenses will not fully illuminate the sensor/film area of ...

  3. FramesDirect.com - Wikipedia

    en.wikipedia.org/wiki/FramesDirect.com

    Consumers can purchase frames, prescription eyeglasses, prescription or plain sunglasses, and contact lens refills. [9] After choosing the desired frames, the consumer goes through a three-step process to order lenses including choosing the lens type, lens thickness, and optional enhancement features. [11]

  4. List of Nikon F-mount lenses with integrated autofocus motor

    en.wikipedia.org/wiki/List_of_Nikon_F-mount...

    The sequence of lens designations may differ in literature. See also full list of Nikon designations, Sigma designations, Tamron designations and Tokina designations.. Nikon AF-S/Sigma HSM/Tamron USD or PZD: The lens contains an integrated ultrasonic focus motor based on piezoelectricity, which enables quiet or low noise autofocus operation.

  5. Circle contact lens - Wikipedia

    en.wikipedia.org/wiki/Circle_contact_lens

    Circle contact lenses aim to create the illusion of stronger limbal rings (shown here are naturally prominent limbal rings without circle contact lenses). The diameter of regular contact lenses that are sold in the United States are on average 14–16 mm. Similar to the diameter of regular contact lenses, circle lenses have no more than 15 mm ...

  6. Optician - Wikipedia

    en.wikipedia.org/wiki/Optician

    Contact lens fitters may work independently or under the direction of an ophthalmologist or optometrist to fill a doctor's prescription for contact lenses. A patient must obtain a prescription for contact lenses from a physician and then the fitter will review contact lens handling, fitting, and follow-up care.

  7. Orthokeratology - Wikipedia

    en.wikipedia.org/wiki/Orthokeratology

    Orthokeratology lens. Orthokeratology, also referred to as Night lenses, Ortho-K, OK, Overnight Vision Correction, Corneal Refractive Therapy (CRT), Accelerated Orthokeretology, Cornea Corrective Contacts, Eccentricity Zero Molding, and Gentle Vision Shaping System (GVSS), is the use of gas-permeable contact lenses that temporarily reshape the cornea to reduce refractive errors such as myopia ...

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