Evaluation of a New Criterion of Binocularity

Daum, Kent M.; Rutstein, Robert P.; Houston, Gilbert; Clore, Katherine A.; Corliss, David

doi:10.1097/00006324-198904000-00008

Cited by 18 publications

(9 citation statements)

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“…Risley rotary prisms were used to evaluate distance horizontal fusional vergence ranges [3,8,15]. Approximately equal amounts of prism were slowly introduced in front of each eye at a constant velocity (approximately 2 Δ/s) using the rotary prisms until the subject first reported horizontal diplopia (break value).…”

Section: Methodsmentioning

confidence: 99%

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Normal values of distance heterophoria and fusional vergence ranges and effects of age

Palomo-Álvarez

Puell

Sánchez–Ramos

et al. 2005

Graefe's Arch Clin Exp Ophthalmo

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Distance base-in and base-out recovery means diminished significantly with age such that recovery values fell outside the norm in subjects in the 61-70 year age group and older. This study establishes statistical normal values for distance heterophoria and fusional vergence in a non-clinical population. Mean values such as these are valuable tools for identifying subjects with far binocular anomalies.

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Section: Methodsmentioning

confidence: 99%

“…Heterophoria and fusional vergence range tests are essential components of standard optometric binocular vision assessment [2,3,7,16]. Although it is well known that age affects visual functions, we still have much to learn about the impact of aging on binocular vision.…”

Section: Introductionmentioning

confidence: 99%

Normal values of distance heterophoria and fusional vergence ranges and effects of age

Palomo-Álvarez

Puell

Sánchez–Ramos

et al. 2005

Graefe's Arch Clin Exp Ophthalmo

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“…Risley rotary prisms were used to evaluate distance and near horizontal fusional vergence ranges [35,36]. Approximately equal amounts of prism were slowly introduced in front of each eye at a constant velocity (approximately 2 Δ/s) using the rotary prisms until the subject first reported horizontal diplopia (break value).…”

Section: Subjectsmentioning

confidence: 99%

Binocular function in school children with reading difficulties

Palomo-Álvarez

Puell

2009

Graefes Arch Clin Exp Ophthalmol

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“…There are two main choices of treatment for accommodative dysfunction: refractive correction, i.e. reading addition in order to reduce the amount of blur, and vision therapy (exercises) [13][14][15][16][17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Accommodation in young adults wearing aspheric multifocal soft contact lenses

Pettersson

Ramsay

Lundström

et al. 2011

Journal of Modern Optics

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The aim of the present project was to investigate accommodative behavior in young adults and adolescents fitted with an aspheric multifocal (center distance) contact lens with focus on evaluating whether these lenses can be an alternative treatment for subjects in which a reduced level of blur and thereby accommodation in near vision is aimed at. Twenty normal subjects aged between 21 and 35 years participated in the study. Aberrometry was perfomed using a Zywave TM aberrometer, first on the uncorrected eyes of all subjects, and again while the subjects wore a multifocal contact lens with a þ1.00 add. A Shin-Nippon N Vision-K 5001 Autoref-Keratometer was used to measure accommodative response with two different refractive corrections: (1) habitual spectacle correction only, and (2) habitual correction and a aspheric multifocal (center distance) contact lens. Four hours of adaptation to the lens was allowed. The lag when wearing only the habitual spectacles was compared with the lag while wearing both the habitual spectacles and the aspheric multifocal contact lens. The mean lag of accommodation for the subject group was 0.85 D (AE0.57 SD) and 0.75 D (AE0.52 SD) without and with the multifocal lens, respectively. Statistical analyses showed no difference in lag (t ¼ 0.8479, p ¼ 0.407) with and without the lens. In conclusion, young normal subjects do not relax accommodation when fitted with aspheric multifocal center distance lenses when the addition is þ1.00. It is therefore unlikely that subjects with accommodative ability, in whom the treatment purpose is to reduce blur and thereby accommodation, can be effectively treated with such lenses.

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Evaluation of a New Criterion of Binocularity

Cited by 18 publications

References 0 publications

Normal values of distance heterophoria and fusional vergence ranges and effects of age

Normal values of distance heterophoria and fusional vergence ranges and effects of age

Binocular function in school children with reading difficulties

Accommodation in young adults wearing aspheric multifocal soft contact lenses

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