Mallett fixation disparity unit

Instrument used to measure the associated heterophoria (or compensating prism). It consists of a small central fixation letter X surrounded by two letters O, one on each side of X, the three letters being seen binocularly, and two coloured polarized vertical bars in line with the centre of the X which are seen by each eye separately. The instrument can be swung through 90º to measure any vertical fixation disparity. The associated phoria is indicated by the misalignment of the two polarized bars when the subject fixates the X through cross-polarized filters in front of the eyes. The amount of associated phoria is given by the value of the base-in or base-out prism power necessary to produce alignment. The unit can also be used to detect suppression. See Disparometer; associated heterophoria; uncompensated heterophoria.

单词	mallett fixation disparity unit
释义	Mallett fixation disparity unit Mallett fixation disparity unit Instrument used to measure the associated heterophoria (or compensating prism). It consists of a small central fixation letter X surrounded by two letters O, one on each side of X, the three letters being seen binocularly, and two coloured polarized vertical bars in line with the centre of the X which are seen by each eye separately. The instrument can be swung through 90º to measure any vertical fixation disparity. The associated phoria is indicated by the misalignment of the two polarized bars when the subject fixates the X through cross-polarized filters in front of the eyes. The amount of associated phoria is given by the value of the base-in or base-out prism power necessary to produce alignment. The unit can also be used to detect suppression. See Disparometer; associated heterophoria; uncompensated heterophoria.
随便看	bennett fracture bennett frost personnel services bennett, george kettner bennett, gordon bennett group computer consultants inc. bennett hartman morris and kaplan bennett, hugh hammond bennett i moyle associates, inc bennett island bennettitaceae bennettitales bennettitatae bennettites bennettitis bennett james gordon bennett, james gordon bennett, james gordon, jr. bennett, john hughes bennett, john w. bennett kielson storch desantis and company, llp bennett kuhn varner bennett-leahy bill bennett lesion bennett lester carter bennett lumber products, inc.