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2. Prism correction - Wikipedia

   en.wikipedia.org/wiki/Prism_correction

   Individuals with nystagmus, Duane's retraction syndrome, 4th Nerve Palsy, and other eye movement disorders experience an improvement in their symptoms when they turn or tilt their head. Yoked prism can move the image away from primary gaze without the need for a constant head tilt or turn. [1] Prism correction is measured in prism dioptres. A ...

3. Vertex distance - Wikipedia

   en.wikipedia.org/wiki/Vertex_distance

   Since most refractions (the measurement that determines the power of a corrective lens) are performed at a vertex distance of 12–14 mm, the power of the correction may need to be modified from the initial prescription so that light reaches the patient's eye with the same effective power that it did through the phoropter or trial frame.

4. Ptosis crutches - Wikipedia

   en.wikipedia.org/wiki/Ptosis_crutches

   A skilled craftsman can successfully install ptosis eye crutches to almost any frame. The upper eyewire must be close to the orbit of the eyelid. Frames with large or small B measurements may be difficult to work with for ptosis crutches. [4] Plastic Frames: Plastic frames must be thick enough for crutches to be attached or embedded into the ...

5. Ophthalmic trial frame - Wikipedia

   en.wikipedia.org/wiki/Ophthalmic_trial_frame

   A trial frame is a tool used by ophthalmic professionals like ophthalmologists and optometrists. It is basically an adjustable spectacle frame with multiple cells, used to hold corrective lenses , and other accessories in subjective refraction (finding the correct spectacle power) and retinoscopy .

6. Dioptric correction - Wikipedia

   en.wikipedia.org/wiki/Dioptric_correction

   At the bottom of the image: the eyeglass Dioptric correction [ 1 ] is the expression for the adjustment of the optical instrument to the varying visual acuity of a person's eyes . It is the adjustment of one lens to provide compatible focus when the viewer's eyes have differing visual capabilities.

7. Shoppers love this $7 eyeglass cleaning kit to get lenses ...

   www.aol.com/lifestyle/shoppers-love-this-7...

   A much better way to disappear dirt, oil, smears and specks of lint is the megapopular Koala Eyeglass Lens Cleaner kit. This Amazon bestseller includes a bottle of alcohol-free cleaner and a ...

8. I tried those Pair Eyewear glasses with the magnetic frames ...

   www.aol.com/lifestyle/tried-those-pair-eyewear...

   But the glasses themselves (which took around 10 days to arrive — your mileage may vary) are great; they're lightweight and comfortable, and Pair nailed my fairly complicated progressive-lens ...

9. Adjustable-focus eyeglasses - Wikipedia

   en.wikipedia.org/wiki/Adjustable-focus_eyeglasses

   Adjustable focus eyeglasses have one focal length, but it is variable without having to change where one is looking. Possible uses for such glasses are to provide inexpensive eyeglasses for people from low-income groups, developing countries, third world countries or to accommodate for presbyopia.