Tenders are invited for Instruments and equipment medical, surgical and dental (air sterilizer, pnevmotonometr projector signs schilova lamp, a set of trial lenses
with trial frames, colposcope, tsystouretroskop observation, diatermokoahulyator surgical, medical suction electric, Centrifuges etc.
A case from 1894 containing 43 pairs of metal-rimmed and goldrimmed trial lenses
, plus two trial frames.
The vision exam for dogs involves eye drops, trial lenses
and streak retinoscopy.
When you're being fitted for contacts, make sure your eye health professional provides you with a pair of trial lenses
before ordering the final pair.
After the lieutenant put the trial lenses
in his eyes, I checked his vision and the fit.
He said: "There is not much data about the issue but the re-use of trial lenses
did not seem to us a good idea.
Refractive errors are currently measured using trial lenses
, which do not measure higher order aberrations and rely on subjective patient feedback.
Once the trial lenses
have been dispensed, every eye care practitioner hopes that this will be the final prescription for the presbyopic patient.
By the afternoon, I had sorted through the trial lenses
and had begun labelling the donated glasses.
It then follows that many of the younger new fits will be more complex prescriptions; this will often mean that trial lenses
need to be ordered.
A trial frame and a set of trial lenses
doesn't guarantee a successful refraction, in the same way throwing some high-end frames on your shelf won't guarantee success selling them.
This can be confirmed by checking the amount of prism thinning surfaced at the prism reference point by taking equivalent amounts of prism from the trial set, correctly positioning the spectacle frame on the patient and simultaneously placing the trial lenses
base up before each spectacle lens.