{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,12]],"date-time":"2026-06-12T03:56:56Z","timestamp":1781236616026,"version":"3.54.1"},"reference-count":41,"publisher":"Wiley","issue":"5","license":[{"start":{"date-parts":[[2009,5,1]],"date-time":"2009-05-01T00:00:00Z","timestamp":1241136000000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"},{"start":{"date-parts":[[2009,5,1]],"date-time":"2009-05-01T00:00:00Z","timestamp":1241136000000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["OVS"],"published-print":{"date-parts":[[2009,5]]},"abstract":"<jats:title>ABSTRACT<\/jats:title>\n                  <jats:sec>\n                    <jats:title>Purpose.<\/jats:title>\n                    <jats:p>Homonymous hemianopia (the loss of vision on the same side in each eye) impairs the ability to navigate and walk safely. We evaluated peripheral prism glasses as a low vision optical device for hemianopia in an extended wearing trial.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods.<\/jats:title>\n                    <jats:p>Twenty\u2010three patients with complete hemianopia (13 right) with neither visual neglect nor cognitive deficit enrolled in the 5\u2010visit study. To expand the horizontal visual field, patients\u2019 spectacles were fitted with both upper and lower Press\u2010On Fresnel prism segments (each 40 prism diopters) across the upper and lower portions of the lens on the hemianopic (\u201cblind\u201d) side. Patients were asked to wear these spectacles as much as possible for the duration of the study, which averaged 9 (range: 5 to 13) weeks. Clinical success (continued wear, indicating perceived overall benefit), visual field expansion, perceived direction, and perceived quality of life were measured.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results.<\/jats:title>\n                    <jats:p>Clinical success: 14 of 21 (67%) patients chose to continue to wear the peripheral prism glasses at the end of the study (two patients did not complete the study for non\u2010vision reasons). At long\u2010term follow\u2010up (8 to 51 months), 5 of 12 (42%) patients reported still wearing the device. Visual field expansion: expansion of about 22\u00b0 in both the upper and lower quadrants was demonstrated for all patients (binocular perimetry, Goldmann V4e). Perceived direction: two patients demonstrated a transient adaptation to the change in visual direction produced by the peripheral prism glasses. Quality of life: at study end, reduced difficulty noticing obstacles on the hemianopic side was reported.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusions.<\/jats:title>\n                    <jats:p>The peripheral prism glasses provided reported benefits (usually in obstacle avoidance) to 2\/3 of the patients completing the study, a very good success rate for a vision rehabilitation device. Possible reasons for long\u2010term discontinuation and limited adaptation of perceived direction are discussed.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1097\/opx.0b013e31819f9e4d","type":"journal-article","created":{"date-parts":[[2009,5,21]],"date-time":"2009-05-21T16:18:35Z","timestamp":1242922715000},"page":"492-502","source":"Crossref","is-referenced-by-count":66,"title":["Clinical and Laboratory Evaluation of Peripheral Prism Glasses for Hemianopia"],"prefix":"10.1002","volume":"86","author":[{"given":"Robert G.","family":"Giorgi","sequence":"first","affiliation":[{"name":"Department of Ophthalmology Schepens Eye Research Institute Harvard Medical School Boston Massachusetts"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Russell L.","family":"Woods","sequence":"additional","affiliation":[{"name":"Department of Ophthalmology Schepens Eye Research Institute Harvard Medical School Boston 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