Open Access Peer-reviewed

Light Sensitivity and Visual Field Extension in Hemianopes Wearing Halfmoon Prismatic Sectors

Carlo Aleci1,, Tiziana Usai1, Marzia Paiola2

1Department of Ophthalmology, the Gradenigo Hospital, Turin, Italy

2The NASI Institute, Moncalieri, Italy

American Journal of Medical and Biological Research. 2013, 1(3), 77-85. DOI: 10.12691/ajmbr-1-3-4
Published online: August 25, 2017

Abstract

A consistent body of literature maintains that the use of monocular sector prisms may enlarge the field of view of hemianopic patients, leading to a substantial improvement of their everyday life. Despite the potential interest, as far as we know clinical trials focusing on this last topic are few. Indeed, the effect of the monocular sector prisms on the whole extent of the binocular visual field and on the differential light sensitivity of the monocular ipsilateral visual field has not been fully investigated. This study aims at estimating the effect of a particular monocular prismatic sector, halfmoon shaped, placed on the carrier lens on the side of the loss, on the differential light sensitivity as well as on the binocular visual field extent in hemianopic patients. The only significant ameliorative finding is the reduction of the gradient of sensitivity between the blind and the responsive side of the monocular visual field in the eye under the prism. However, it fails to increase the differential light sensitivity of the eye fitted with the prism. Likewise, the extent of the binocular visual field did not change significantly, irrespective whether an adaptation period had occurred or not. In conclusion, our results suggest that the ameliorative effect in hemianopes provided by the of prismatic treatment depends on the enlargement of the field of view rather than on substantial enlargement of the visual field and/or on increased light sensitivity.

Keywords:

hemianopia, visual field, differential light sensitivity, prismatic treatment, monocular sectors
[1]  Gilhotra, J.S., Mitchell P., Healey P.R., Cumming R.J., Currie J., “Homonymous visual field defects and stroke in an older population“, Stroke, 33. 2417-2420. 2002.
 
[2]  Huber, A., “Homonymous hemianopia”, Neuroophthalmology, 12. 351-66. 1992.
 
[3]  Smith, J.L., “Homonymous hemianopia, a review of one hundred cases”, Am J Ophthalmol, 54. 616-623. 1962.
 
[4]  Giorgi, R.G., Woods, R.L., Peli, E., “Clinical and laboratory evaluation of peripheral prism glasses for hemianopia”, Optom Vis Sci, 86. 492-502. 2009
 
[5]  Gottlieb, D.D., “Method of using a prism in lens for the treatment of visual field loss”, U.S. Patent, 4, 779, 972, 19. 1988.
 
[6]  Gottlieb D.D., Freeman P., Williams M., “Clinical research and statistical analysis of a visual field awareness system”, J Am Optom Assoc, 63. 581-588. 1992.
 
[7]  Jose, R.T, Smith, A.J., “Increasing peripheral field awareness with Fresnel prisms”, Rev Optom, 3. 3-37. 1976.
 
[8]  Lee A.G., Perez, A.M., “Improving awareness of peripheral visual field using sectorial prisms” J Am Optom Assoc, 70. 624-628. 1999.
 
[9]  Peli, E., “Field expansion for homonymous hemianopia by optically induced peripheral exotropia”, Optom Vis Sci, 77: 463-464. 2000.
 
[10]  Smith JL, Werner IG, Lucero AJ., “Hemianopic Fresnel prisms”. J Clin Neuro Ophthalmol, 2. 19-22. 1982.
 
[11]  Szlyk, J., Seiple, W., Stelmack, J., McMahon, T., “Use of prisms for navigation and driving in hemianopic patients”, Ophthalmic Physiol Opt, 25. 128-135. 2005.
 
[12]  Rossi, P.W., Kheyfets, S., Reding, M.J., “Fresnel prisms improve visual perception in stroke patients with homonymous hemianopia or unilateral visual neglect”, Neurology, 40. 1597-1599. 1990.
 
[13]  Göte, H., Gregersen, E., Rindziunski, E., “Exotropia and panoramic vision compensating for an occult congenital homonymous hemianopia: A case report”, Binocul Vis Eye Muscle Surg Q, 8. 129-132. 1993.
 
[14]  Herzau, V., Bleher, , Joos-Kratsch, E., “Infantile exotropia with homonymous hemianopia: a rare contraindication for strabismus surgery”, Graefes Arch Clin Exp Ophthalmol, 226. 148-149. 1988.
 
[15]  Hoit, C.S., Good, W.V., “Ocular motor adaptations to congenital hemianopia. Binocul Vis Eye Muscle Surg Q”, 8. 125-126. 1993.
 
[16]  Levy, Y., Turetz, J., Krakowski, D., Hartmann B, Nemet P. “Development of compensating exotropia with anomalous retinal correspondence after early infancy in congenital homonymous hemianopia”, J Pediatr Ophthalmol Strabismus, 32. 236-238. 1995.
 
[17]  Bowers, A.R., Keeney, K., Peli, E., “Community-based trial of a peripheral prism visual field expansion device for hemianopia”, Arch Ophthalmol, 126. 657-664. 2008.
 
[18]  Woo, G.C., Mandelman, T., “Fresnel prism therapy for right hemianopia” Am J Optom Physiol Opt, 60: 739-743. 1983.
 
[19]  Wall, M., Neahring, R.K., Wooward, K.R., “Sensitivity and specificity of frequency doubling perimetry in neuro-ophthalmic disorders: a comparison with conventional automatic perimetry”, Invest Ophthalmol Vis Sci, 43. 1277-1283. 2002.
 
[20]  Folstein, MF., Folstein, S.E., McHugh, PR., “Mini-mental state. A practical method for grading the cognitive state of patients for the clinician”, J Psychiatr Res, 12. 189-198. 1975.
 
[21]  Kölmel, H.W., “Visual illusions and hallucinations”. In: Kennard C Editor. Baillière’s clinical neurology. International Practice and Research. vol 2, Baillière Tindall Publishers, , 1993.
 
[22]  Johnson, C.A., Keltner, J.L., “Optimal rates of movement for kinetic perimetry”, Arch Ophthalmol, 105. 73-75. 1987.
 
[23]  Wabbels, B.K., Kolling, G., „Auswirkung unterschiedlicher Prüfgeschwindigkeiten auf die Ergebnisse der kinetischen Perimetrie“, Ophthalmologe, 99. 5. 1999.
 
[24]  Ramrattan, RS., Wolfs, RCW., Panda-Jonas, S., Jonas, JB., Bakker, D., Pols, H.A., Hofman, A,, de Jong, PTVM., “Prevalence and causes of visual field loss in the elderly and associations with impairment in daily functioning: the Rotterdam Study”, Arch Ophthalmol, 119. 1788-1794. 2001.
 
[25]  Tsai, S.Y., Cheng, C.Y., Hsu, W.M., Su, T.P., Liu, J.H., Chou, P., “Association between visual impairment and depression in the elderly”, J Formosan Med Assoc, 102. 86-90. 2003.
 
[26]  Bruell, J.H., Peszczynski, M., “Perception of verticality in hemiplegic patients in relation to rehabilitation”, Clin Orthop, 12. 124-130. 1958.
 
[27]  Denes, G., Semenza, C., Stoppa, E., Lis, A., “Unilateral spatial neglect and recovery from hemiplegia. A follow-up study”, Brain, 105. 543-552.
 
[28]  Kaplan, J., Hier, D.B., “Visuospatial deficits after right hemisphere stroke”, Am J Occup Ther, 36. 314-321. 1982.
 
[29]  Kohler, , “The formation and transformation of the perceptual world”, Psychol Issues, 3.1-174. 1963.
 
[30]  O’Neill, E.C., Connell, P.P., O’Connor, J.C., Brady, J., Reid, I., , P., “Prism therapy and visual rehabilitation in homonymous visual field loss”, Optom Vis Sci, 88. 263-268. 2011.
 
[31]  Bowers, A.R., Tant, M., Peli, E., “A pilot evaluation of on-road detection performance by drivers with hemianopia using oblique peripheral prisms”, Stroke Res Treat, available: http://www.hindawi.com/journals/srt/2012/176806/. 2012.
 
[32]  Gillen, R., Tennen, H., McKee, T., “Unilateral spatial neglect: relation to rehabilitation outcomes in patients with right hemisphere stroke”, Arch Phys Med Rehabil, 86. 763-767. 2005.
 
[33]  Katz, N., Hartman-Maeir, A., Ring, H., Soroker, N., “Functional disability and rehabilitation outcome in right hemisphere damaged patients with and without unilateral spatial neglect”, Arch Phys Med Rehabil, 80. 379-384. 1999.
 
[34]  Paolucci, S., Antonucci, G., Grasso, M.G., Pizzamiglio, L., “The role of unilateral spatial neglect in rehabilitation of right brain-damaged ischemic stroke patients: a matched comparison”, Arch Phys Med Rehabil, 82. 743-749. 2001.
 
[35]  Clark, M.S., Smith, D.S., “The effects of depression and abnormal illness behaviour on outcome following rehabilitation from stroke”, Clin Rehabil, 12. 73-80. 1998.