Bitemporal hemianopia; its unique binocular complexities and a novel remedy
- 21 February 2014
- journal article
- case report
- Published by Wiley in Ophthalmic and Physiological Optics
- Vol. 34 (2), 233-242
- https://doi.org/10.1111/opo.12118
Abstract
Bitemporal hemianopic visual field impairment frequently leads to binocular vision difficulties. Patients with bitemporal hemianopia with pre-existing exophoria complain of horizontal diplopia, sometimes combined with vertical deviation (with pre-existing hyperphoria). The symptoms are a result of the phoria decompensating into a tropia (hemi-slide) due to the lack of retinal correspondence between the remaining nasal fields of both eyes. We measured these effects using a dichoptic perimeter. We showed that aligning the eyes with prisms could prevent diplopia if the bitemporal hemianopia is incomplete. We also describe the successful use of a novel fusion aid - the 'stereo-typoscope' - that utilizes midline stereopsis to prevent diplopia resulting from hemi-sliding in patients with complete bitemporal hemianopia.Keywords
Funding Information
- National Institutes of Health (R01EY012890)
- National Institutes of Health (R01EY023385)
- National Institutes of Health (P30EY003790)
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