Accommodative lag under habitual seeing conditions: comparison between adult myopes and emmetropes
| Autor: | Satoshi Hasebe, Fumitaka Nonaka, Chiaki Nakatsuka, Hiroshi Ohtsuki |
|---|---|
| Rok vydání: | 2003 |
| Předmět: |
Adult
Male Refractive error genetic structures Eye disease Emmetropia Vision disorder Myopia Medicine Humans Vision test Vision Binocular Monocular business.industry Vision Tests Accommodation Ocular General Medicine medicine.disease eye diseases Ophthalmology Visual Perception Optometry Female sense organs medicine.symptom business Accommodation Binocular vision |
| Zdroj: | Japanese journal of ophthalmology. 47(3) |
| ISSN: | 0021-5155 |
| Popis: | To clarify whether myopes show poor accommodative response and thus have a larger accommodative lag under natural seeing conditions.Forty-three adults without other ocular abnormalities were classified into the early-onset myopia (EOM, n=28) and the emmetropia (EMM, n=15) groups. The subjects wore glasses or contact lenses that they habitually used, and accommodative responses to four accommodative targets (16.0-50.5 cm from their eyes) were measured under a monocular or binocular condition using an open-field infrared autorefractometer.Under a binocular condition, the accommodative lag for each target was significantly smaller in the EOM group (analysis of variance, P.01), but the mean slope of the accommodative stimulus-response function did not significantly differ between the EOM and EMM groups (1.05+/-0.11 and 1.02+/-0.10 D/D, respectively). The mean slope under a binocular condition was significantly steeper than that under a monocular condition in both groups (paired t-test, P.05).In adults with EOM, the accommodative stimulus-response function was not impaired, and the habitual accommodative lag was rather small, probably due to the reduced accommodative demand by a vertex distance and/or the intentional undercorrection of spectacles. |
| Databáze: | OpenAIRE |
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