Fitting prescription glasses and frames

Considerations in fitting frames and glasses.

The optician low vision spectacles and telescopes should be able to take care about all details of fitting glasses, from explaining the advantages of specific types of frames and using imagination in selecting and designing an attractive prescription, to conveying to the patients the appearance of the finished glasses so that they know what to expect.

All details of fitting glasses.

Selection

The optician has to take the initiative in explaining why “designer’s frames” are not suitable for prism glasses or heavy prescriptions, and suggesting the most appropriate frames fro prescription. The frame shape should be the first consideration, followed by measurements of bridge size, frame demension, and finally, selection of color.

Appearance

Frames should be attractive as possible considering the prescription. Patients appreciate looking stylish and not to “different” and will tolerate unusual lenses such as telescopes if they are able to see well. Even telescopes look more attractive if care used in frame selection.

Shape

Frame shapes should not be too abstract or extreme; fro example, goggle shaped frames have too much unusable area within the eye wire. A round or modified rectangular shape is best for low vision prescription.

Dimensions

Ideally the smallest frame dimensions should be selected; vertical and horizontal diameters should be approximately equal to achieve minimal diagonal measurement. If frames are to large, the lens blanks are no wide enough to decenter for prisms, and edge thickness is excessive in high minus or plus lenses.

Size

A frame should be available in as many eye sizes, bridge widths, and temple length as possible. There should be a selection of frames in small eye sizes.

Material

In general, plastic frames are more durable than metal and hide the bevel in high powers. Lenses also do not pop out of a plastic frame as easily as form metal although the frame may need adjustment more often.

Adjustable Nosepads

Frames with adjustable nosepads are particularly important for patients who have flat bridges or who are being fitted for telescopes. For patients with heavy lenses, extra-large nosepads are specially ordered to provide better support and comfort.

Hinges

Riveted hinges are sturdier than hidden hinges.

Temples

Wire reinforced temples support heavy low vision prescription and are durable.

Color

Frame color should be chosen carefully not to draw attention to the eyewear and to be compatible with a persons appearance and color preferences.