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The prism fusion range (PFR) or fusional vergence amplitude is a clinical eye test performed by orthoptists, optometrists, and ophthalmologists to assess motor fusion, specifically the extent to which a patient can maintain binocular single vision in the presence of increasing vergence demands.
Prism is a studio album by English jazz bassist Dave Holland. [9] The record was released via the Dare2 label on September 2, 2013. [ 10 ] [ 11 ] This album is a milestone of Dave Holland's career as a leader—the forty year anniversary of his debut, the album Conference of the Birds released in 1973. [ 12 ]
Typical pair of single vision glasses. Single vision lenses correct for only one distance. If they correct for far distance, the person must accommodate to see up close. If the person cannot accommodate, they may need a separate correction for near distances, or else use a multifocal lens (see below).
Beginning in June 2016, then Master Chief Petty Officer of the Navy, Michael D. Stevens, oversaw a review of the Navy's existing enlisted rating system. [4] After Stevens's retirement, a group of senior enlisted leaders came to the conclusion that the Navy needed to replace its current enlisted system and announced the changes on 29 September 2016 with the release of NAVADMIN 218/16.
Adjustable focus lenses, like single-focus lenses, also reduce image-jump and spatial distortion in the field of view associated with traditional multi-focal lenses. Additionally, the ideal near-vision correction can be achieved with precision, because the variable lenses emulate the focusing action of the youthful (non-presbyopic) eye.
The prism cover test (PCT) is an objective measurement and the gold standard in measuring strabismus, i.e. ocular misalignment, or a deviation of the eye. [1] It is used by ophthalmologists and orthoptists in order to measure the vertical and horizontal deviation and includes both manifest and latent components. [1]
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