trial frame

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tri·al frame

a type of spectacle frame with variable adjustments, for holding trial lenses during refraction.

Farlex Partner Medical Dictionary © Farlex 2012

tri·al frame

(trī'ăl frām)

A type of spectacle frame with variable adjustments, for holding trial lenses during refraction.

Medical Dictionary for the Health Professions and Nursing © Farlex 2012

trial frame

An eyeglass frame for holding trial lenses while a person is being fitted for glasses.

trial frame

Spectacle frame with variable adjustments for interpupillary distance, side length, etc. in which each lens rim is fitted with a number of cells into which trial lenses can be placed when testing vision (Fig. T18). See phoropter; Simultantest.

Fig. T18 Trial frame

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References in periodicals archive ?

With trial frame: near--14[DELTA] base out; distance 10[DELTA] base out

Binocular vision case studies

This is easier to say than to put into practice; the third article of this series (see OT March 23 2012) discussed the difficulty of a young child wearing a trial frame and how this can sometimes make it difficult to record a reliable corrected acuity, if the child is distracted by the discomfort and restricted field from the frame.

Optometric management of childhood visual problems: young children's vision Part 5 C-18925 O/D

A case from 1894 containing 43 pairs of metal-rimmed and goldrimmed trial lenses, plus two trial frames. This traditional lens-testing method has now been replaced by automatic refraction machines.

The eyes have it as new exhibition goes on show

Different types of Telescopes, Magnifiers, Visual Acuity charts, LEA symbols, trial frames, trail boxes, Field Magnifier and TV 300 system were also provided in the kit.

Low Vision clinics established in 10 Punjab Districts

To celebrate the World Sight Day, Meghrigian Instituite decided to donate ophthalmic trial lens sets and trial frames

Strengthening Ophthalmic Care in Gegharkunik: Donation of Ophthalmic Equipment to Sevan, Gavar, Martuni, Vardenis and Tchambarak Ophthalmic Offices

first assessed the impact of new frame rate by actual coding trial frames and then decided how to change frame rate [12].

Joint spatial-temporal quality improvement scheme for H.264 low bit rate video coding via adaptive frameskip

The field test was highlighted as a dislike by 14% of respondents and 10% do not enjoy wearing the heavy trial frames.