How often are spectacle lenses not dispensed as prescribed?

Prescribing of Spectacle Lenses.

SIRS,-The attention of the Council of British Ophthalmologists has been drawn to the difficulty which the Services and the Ministry of Health are experiencing in obtaining spectacle lenses to supply their urgent needs, and it has been suggested that the situation could be helped by a simplification of the prescriptions supplied by civilian ophthalmic surgeons. LThe Council has considered the qu...

Axial Performance of Spectacle Lenses

The measured values of the axial meridional powers for 311 spectacle lenses are reported. The spherical refractive powers range from + 7 . 0 0 to —20.00 diopters with cylindrical powers of 0.00, 1.00, and 2.00 diopters. The departures of the measured from the nominal values are shown. The probable errors of measurement are discussed. A set of tolerance values is suggested and the degree of comp...

Clinically Paired Electrodes Are Often Not Perceived as Pitch Matched

For bilateral cochlear implant (CI) patients, electrodes that receive the same frequency allocation often stimulate locations in the left and right ear that do not yield the same perceived pitch, resulting in a pitch mismatch. This pitch mismatch may be related to degraded binaural abilities. Pitch mismatches have been found for some bilateral CI users and the goal of this study was to determin...

How often is medication taken as prescribed? A novel assessment technique.

The evaluation of the efficacy of medication is confounded when patients do not adhere to prescribed regimens. Overdosing, underdosing, and erratic dosing intervals can diminish drug action or cause adverse effects. Using a new method with epilepsy as a model, we assessed compliance with long-term medications among newly treated and long-term patients. Medication Event Monitor Systems (Aprex Co...

How safe are intraocular lenses?