Sentence examples for trial frames from inspiring English sources
In all cases, the abnormal results were explained by drooping eyelids, obstruction by spectacles or trial frames and subject error, which are common hazards of automated perimetry [ 32].
The vision task lasted for 7 min, and was performed four times: each time with different trial lenses mounted on trial frames.
The refraction measure recorded for each eye was mounted in the trial frames using trial lenses (rounded up or down to the nearest 0.25 diopters).
All participants wore trial frames with a refractive correction suitable for the viewing distance of 60 cm to ensure that any obstruction to the field of view caused by spectacle frames would be equivalent for everyone.
If the corrected VA was less than 20/20 an objective refraction using a streak retinoscope, trial frames and lenses was performed by the same two ophthalmologists (SAS, EH).
Visual acuity was measured with lenses of the indicated power placed into trial frames (empty frames into which lenses of any desired power can be mounted) with a vision chart with identical layout and different sequence of letters from above.
Presenting distance visual acuity (VA) was measured at 4 and 1 m using a reduced logarithm of the minimum angle of resolution tumbling E chart and then with trial frame based on autorefraction.
The prescription providing best-corrected visual acuity at the test distance was placed into a trial frame, with the eye not being tested occluded.
To compute the performance score, we first measured the similarity (dot-product) of every test trial frame, with all expected population response vectors.
Myopia was induced by adding plus ophthalmic lenses of 1D, 2D, and 4D in a plastic trial frame for both eyes, and cortical responses were recorded for each condition in this order in all subjects.
Where prism treatment is being considered, obtain a prior measurement of the associated phoria, insert the prism to be prescribed into the trial frame and measure the associated phoria with the prism in situ.
