The 20 Prism Diopter Base Out Prism Test in Pseudostrabismus

References

• Birch EE, Castaneda YS, Cheng-Patel CS, et al. Associations of eye-related quality of life with vision, visuomotor function, and self-perception in children with strabismus and anisometropia. Invest Ophthalmol Vis Sci. 2020;61(11):22.
   Web of Science ®Google Scholar
• Meier K, Giaschi D. Unilateral amblyopia affects two eyes: fellow eye deficits in amblyopia. Invest Ophthalmol Vis Sci. 2017;58(3):1779–1800. doi:10.1167/iovs.16-20964.
   Web of Science ®Google Scholar
• O’Connor AR, Birch EE, Anderson S, Draper H. The functional significance of stereopsis. Invest Ophthal Vis Sci. 2010;51(4):2019–2023. doi:10.1167/iovs.09-4434.
   PubMed Web of Science ®Google Scholar
• Hatt S, Leske DA, Castañeda YS, et al. Association of strabismus with functional vision and eye-related quality of life in children. JAMA Ophthalmol. 2020;138(5):528–535. doi:10.1001/jamaophthalmol.2020.0539.
   PubMed Web of Science ®Google Scholar
• Chua B, Mitchell P. Consequences of amblyopia on education, occupation, and long term vision loss. Br J Ophthalmol. 2004;88(9):1119–1121. doi:10.1136/bjo.2004.041863.
   Web of Science ®Google Scholar
• Birch EE. Marshall Parks lecture: binocular sensory outcomes in accommodative ET. J AAPOS. 2003;7(6):369–373. doi:10.1016/j.jaapos.2003.08.003.
   Web of Science ®Google Scholar
• Birch EE, Fawcett SL, Morale SE, et al. Risk factors for accommodative esotropia among hypermetropic children. Invest Ophthalmol Vis Sci. 2005;36(2):526. doi:10.1167/iovs.04-0618.
   Google Scholar
• Robaei D, Rose KA, Kifley A, et al. Factors associated with childhood strabismus: findings from a population-based study. Ophthalmology. 2006;113(7):1146–1153. doi:10.1016/j.ophtha.2006.02.019.
   PubMed Web of Science ®Google Scholar
• Pritchard C, Ellis G. Manifest strabismus following pseudostrabismus diagnosis. Am Orthoptic J. 2007;57(1):111–117. doi:10.3368/aoj.57.1.111.
   Google Scholar
• Cotter SA, Varma R, Tarczy-Hornoch K, et al. Joint writing committee for the multi-ethnic pediatric eye disease study and the Baltimore pediatric eye disease study groups. Risk factors associated with childhood strabismus: the multi-ethnic pediatric eye disease and Baltimore pediatric eye disease studies. Ophthalmology. 2011;118(11):2251–2261. doi:10.1016/j.ophtha.2011.06.032.
   PubMed Web of Science ®Google Scholar
• Silbert AL, Matta NS, Silbert DI. Incidence of strabismus and amblyopia in preverbal children previously diagnosed with pseudoesotropia. J AAPOS. 2012;16(2):118–119. doi:10.1016/j.jaapos.2011.12.146.
   Web of Science ®Google Scholar
• Anwar DS, Woreta FA, Weng CY, Repka MX. Incidence of esotropia developing in subjects previously diagnosed with pseudoesotropia: a pilot study. Strabismus. 2012;20(3):124–126. doi:10.3109/09273972.2012.702368.
   Google Scholar
• Maconachie GDE, Gottlob I, McLean RJ. Risk factors and genetics in common commitant strabismus: a systematic review of the literature. JAMA Ophthalmol. 2013;131(9):1179–1186. doi:10.1001/jamaophthalmol.2013.4001.
   PubMed Web of Science ®Google Scholar
• Fawcett S, Leffler J, Birch EE. Factors influencing stereoacuity in accommodative esotropia. J AAPOS. 2000;4(1):15–20. doi:10.1016/S1091-8531(00)90006-5.
   PubMed Web of Science ®Google Scholar
• Ing MR. Early surgical alignment for congenital ET. JPOS. 1983;20:11–18.
   Google Scholar
• Birch EE, Stager DR. Long term motor and sensory outcomes after early surgery for infantile esotropia. JAAPOS. 2006;10:409–413.
   PubMed Web of Science ®Google Scholar
• Birch EE, Fawcett S, Stager DR. Why does early surgical alignment improve stereoacuity outcomes in infantile esotropia? J AAPOS. 2000;4(1):10–14. doi:10.1016/S1091-8531(00)90005-3.
   PubMed Web of Science ®Google Scholar
• Fawcett S, Birch EE. Risk factors for abnormal binocular vision after successful alignment of accommodative esotropia. J AAPOS. 2003;7(4):256–262. doi:10.1016/S1091-8531(03)00111-3.
   PubMed Web of Science ®Google Scholar
• Cerman E, Eraslan M, Ogut MS. The relationship of age when motor alignment is achieved and the subsequent development of stereopsis in infantile esotropia. J AAPOS. 2014;18(3):222–225. doi:10.1016/j.jaapos.2013.12.017.
   Web of Science ®Google Scholar
• Tukkers-van Alst FS, Rensen CS, De Graaf ME, et al. Assessment of psychomotor development before and after strabismus surgery for infantile esotropia. JPOS. 2007;44(6):350–355. doi:10.3928/01913913-20071101-02.
   Google Scholar
• Drover JR, Stager DR, Morale SE, et al. Improvement in motor development following surgery for infantile esotropia. J AAPOS. 2008;12(2):136–140. doi:10.1016/j.jaapos.2007.08.013.
   Web of Science ®Google Scholar
• Pineles SL, Demer JL, Isenberg SJ, et al. Improvement in binocular summation after strabismus surgery. JAMA Ophthalmol. 2015;133(30):326–332. doi:10.1001/jamaophthalmol.2014.5265.
   Google Scholar
• Fathy VC, Elton PJ. Orthoptic screening for three- and four-year-olds. Public Health. 1993;107(1):19–23. doi:10.1016/S0033-3506(05)80488-3.
   Web of Science ®Google Scholar
• Anker S, Atkinson J, Braddick O, et al. Identification of infants with significant refractive error and strabismus in a population screening program using noncycloplegic videorefraction and orthoptic examination. Invest Ophthalmol Vis Sci. 2003;44(2):497–504. doi:10.1167/iovs.02-0070.
   Web of Science ®Google Scholar
• Arnoldi K. Orthoptic evaluation and treatment. In: Wilson M, Trivedi R, Saunders R, eds. Pediatric Ophthalmology. Berlin, Heidelberg: Springer; 2009:126–127.
   Google Scholar
• Cornell E. Binocular responses to monocular placement of a 10 Base Out Prism: part I. Initial versions and vergences: a pilot study in 30 normals. Binocular Vision and Eye Muscle Surgery Qtr. 1995;10:39–46.
   Google Scholar
• Ryu WY, Lambert SR. Incidence of strabismus and amblyopia among children initially diagnosed with pseudostrabismus using the Optum data set. Am J Ophthalmol. 2020;211:98–104. doi:10.1016/j.ajo.2019.10.036.
   Web of Science ®Google Scholar
• Dendy HM, Shaterian ET. Examination of a small child. Charles C Thomas Publisher Springfield, Ill; 1967. Practical Ocular Motility.
   Google Scholar
• Kaban T, Smith K, Beldavs R, et al. The 20-prism-dioptre base-out test: an indicator of peripheral binocularity. Can J Ophthalmol. 1995;30(5):247–250.
   Web of Science ®Google Scholar
• Turner JE, Horwood AM, Houston SM, Riddell PM. Development of the response AC/A ratio over the first year of life. Vision Res. 2002;42(22):2521–2532. doi:10.1016/S0042-6989(02)00268-7.
   PubMed Web of Science ®Google Scholar
• Horwood A, Riddell P. Developmental changes in the balance of disparity, blur, and looming/proximity cues to drive ocular alignment and focus. Perception. 2013b;42(7):693–715. doi:10.1068/p7506.
   Web of Science ®Google Scholar
• Horwood A. Typical and atypical development of ocular alignment and binocular vision in infants – the background. https://www.aao.org/disease-review/typical-atypical-development-of-ocular-alignment-b. Published June 5, 2019. Accessed February 8, 2021.
   Google Scholar
• Riddell P, Horwood AM, Houston SM, et al. The response to prism deviations in human infants. Curr Biol. 1999;9(18):1050–1052. doi:10.1016/S0960-9822(99)80456-4.
   Web of Science ®Google Scholar
• Babinsky E, Candy RT. Why do only some hyperopes become strabismic? Invest Ophthalmol Vis Sci. 2013;54(7):4941–4955. doi:10.1167/iovs.12-10670.
   PubMed Web of Science ®Google Scholar
• Pritchard C, Ellis GS. Efficacy of modified cover testing for detection of incipient true strabismus with pseudostrabismus diagnosis. Am Orthopt J. 2013;63(1):73–79. doi:10.3368/aoj.63.1.73.
   Google Scholar
• Koklanis C. Prism reflex test. [Video]. YouTube. https://www.youtube.com/watch?v=eiabTQO4ylU. Published December 13, 2016. Accessed February 8, 2021.
   Google Scholar
• Rowe F. Clinical Orthoptics. 3rd ed. West Sussex, UK: Wiley-Blackwell; 2012:81.
   Google Scholar