Accuracy of accommodation in heterophoric patients: testing an interaction model in a large clinical sample
| Autor: | Satoshi Hasebe, Hiroshi Ohtsuki, Fumitaka Nonaka |
|---|---|
| Rok vydání: | 2005 |
| Předmět: |
Adult
Accommodative response genetic structures Adolescent Intermittent tropia Humans Accommodative infacility Strabismus Child Monocular Esotropia business.industry Accommodation Ocular Convergence Ocular Refractive Errors Sensory Systems Ophthalmology Heterophoria Case-Control Studies Optometry Exotropia Regression Analysis Accommodative lag Psychology business Accommodation |
| Zdroj: | Ophthalmicphysiological optics : the journal of the British College of Ophthalmic Opticians (Optometrists). 25(6) |
| ISSN: | 0275-5408 |
| Popis: | A model of the cross-link interactions between accommodation and convergence predicted that heterophoria can induce large accommodation errors (Schor, Ophthalmic Physiol. Opt. 1999;19:134-150). In 99 consecutive patients with intermittent tropia or decompensated phoria, we tested these interactions by comparing their accommodative responses to a 2.50-D target under binocular fused conditions (BFC) and monocular occluded conditions (MOC). The accommodative response in BFC frequently differed from that in MOC. The magnitude of the accommodative errors in BFC, ranging from an accommodative lag of 1.80 D (in an esophoric patient) to an accommodative lead of 1.56 D (in an exophoric patient), was correlated with distance heterophoria and uncorrected refractive errors. These results indicate that heterophoria affects the accuracy of accommodation to various degrees, as the model predicted, and that an accommodative error larger than the depth of focus of the eye occurs in exchange for binocular single vision in some heterophoric patients. |
| Databáze: | OpenAIRE |
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