Clinical Evaluation of the Changes That Occur When Shifting from Glasses to Contact Lenses

Matthews, James F.; Moore, Sally; Cohen, Ricki L.

doi:10.1080/0065955x.1981.11982533

Cited by 3 publications

(4 citation statements)

References 2 publications

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“…The early detection of non-strabismic binocular vision-related disorders in a patient wearing both spectacle and soft contact lenses may prevent near vision problems like headache, asthenopia and blurred vision, and progression of refractive error (9). In our study, we found a greater value of near point of convergence while wearing soft contact lens meaning that receded of near point of convergence with soft contact lens.…”

Section: Discussionsupporting

confidence: 49%

“…For myopes, spectacles lenses offer a base-in prismatic effect when xating near, which brings about a reduction in the need for convergence (11). While with contact lenses in comparison to spectacle, a greater amount of convergence is required (9). The reverse is the case for hypermetropic prescriptions as spectacle lenses offer a base-out prism while viewing near thus, increasing the convergence effort required (9).…”

Section: Introductionmentioning

confidence: 99%

“…While with contact lenses in comparison to spectacle, a greater amount of convergence is required (9). The reverse is the case for hypermetropic prescriptions as spectacle lenses offer a base-out prism while viewing near thus, increasing the convergence effort required (9). The reduced vertex distance of contact lenses compared to spectacle lenses from the eye results in the higher effective power of a myopic prescription and vice versa (6).…”

Section: Introductionmentioning

confidence: 99%

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Acute and Short-term changes in binocular Vision with Spectacles & Spherical Equivalent Soft Contact Lens Wear in Low Myopic Astigmatism

Sapkota

Baral

Koirala

et al. 2023

Preprint

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Background Binocular vision is a complex process that involves the coordination of the two eyes to produce a single image. Spectacles and soft contact lenses are common refractive correction options for low myopic astigmatism. However, the effect of these correction methods on binocular vision has not been extensively studied in clinical practice. This study aims to investigate the acute and short-term changes in binocular vision between spectacles and spherical equivalent soft contact lens wear in low myopic astigmatism. Purpose To investigate the acute and short-term changes in binocular vision with spectacles & spherical equivalent soft contact lens wear in low myopic astigmatism. Method All the subjects underwent a thorough optometric examination and a complete binocular vision evaluation was performed with spectacles and contact lenses on the same day in a group of 36 participants. The accommodative amplitude and accommodative facility, stereo acuity, cover test, horizontal phoria, near the point of convergence (NPC), negative relative accommodation (NRA), positive relative accommodation (PRA), positive fusional reserve, and negative fusional reserve were compared with myopic spectacles and spherical equivalent corrected contact lenses in these subjects. Results Statistically significant differences were found with the use of soft contact lens in comparison to the spectacle: a higher value of NPC (MD; -0.36±0.76, p=0.007), lag of accommodation (MD; -0.11± 0.31, p=0.03) and PRA (MD; 0.35± 0.16, p=0.035). Conclusion The NPC, lag of accommodation, and PRA were changed while wearing contact lenses although other parameters did not show statistical significance. These findings imply that; the spherical equivalent corrected soft contact lens could not be prescribed even in a patient with low myopic astigmatism before screening all the binocular vision parameters.

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Section: Discussionsupporting

confidence: 49%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Acute and Short-term changes in binocular Vision with Spectacles & Spherical Equivalent Soft Contact Lens Wear in Low Myopic Astigmatism

Sapkota

Baral

Koirala

et al. 2023

Preprint

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“…Other parameters, such as negative relative accommodation (NRA), positive relative accommodation (PRA), binocular accommodative facility, stimulus AC:A ratio, and stereoacuity, are used to evaluate the interaction between the vergence and accommodative systems. Even though it is well-known that accommodation and vergence demands depend on the type of optical correction, only a few studies [13,[35][36][37] examine the clinical differences between these parameters in myopes when contact lenses are used as opposed to spectacles. In addition, all of these studies were carried out many years ago, when the material, design, and technical characteristics of SCL were different from those currently available.…”

Section: Introductionmentioning

confidence: 99%

Contact lenses vs spectacles in myopes: is there any difference in accommodative and binocular function?

Jiménez

Martínez-Almeida

Salas

et al. 2010

Graefes Arch Clin Exp Ophthalmol

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The results found in this study show a definite trend towards poorer accommodative and vergence function with the use of contact lenses in comparison to glasses. This downward trend, though not statistically significant in accommodative function (lower PRA values and less lens amplitude of accommodation) might suggest that temporal insufficiency in the accommodation process could be occurring while contact lenses are used, thereby possibly creating a lag in accommodation to reduce associated overconvergence. This would be manifested in more esophoric values being found in the vergence function. The higher accommodative lags found in this study with SCL could indicate that prolonged use of SCL in near tasks may provoke a continuous hyperopic retinal defocus, a risk factor for the onset and progression of myopia, as indicated in numerous studies.

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Contact Lenses as an alternative tospectacles in accommodative esotropia

Calcutt¹,

Mathalone²,

Holland³

1983

Journal of The British Contact Lens Association

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Clinical Evaluation of the Changes That Occur When Shifting from Glasses to Contact Lenses

Cited by 3 publications

References 2 publications

Acute and Short-term changes in binocular Vision with Spectacles & Spherical Equivalent Soft Contact Lens Wear in Low Myopic Astigmatism

Acute and Short-term changes in binocular Vision with Spectacles & Spherical Equivalent Soft Contact Lens Wear in Low Myopic Astigmatism

Contact lenses vs spectacles in myopes: is there any difference in accommodative and binocular function?

Contact Lenses as an alternative tospectacles in accommodative esotropia

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Clinical Evaluation of the Changes That Occur When Shifting from Glasses to Contact Lenses

Cited by 3 publications

References 2 publications

Acute and Short-term changes in binocular Vision with Spectacles &amp; Spherical Equivalent Soft Contact Lens Wear in Low Myopic Astigmatism

Acute and Short-term changes in binocular Vision with Spectacles &amp; Spherical Equivalent Soft Contact Lens Wear in Low Myopic Astigmatism

Contact lenses vs spectacles in myopes: is there any difference in accommodative and binocular function?

Contact Lenses as an alternative tospectacles in accommodative esotropia

Contact Info

Product

Resources

About

Acute and Short-term changes in binocular Vision with Spectacles & Spherical Equivalent Soft Contact Lens Wear in Low Myopic Astigmatism

Acute and Short-term changes in binocular Vision with Spectacles & Spherical Equivalent Soft Contact Lens Wear in Low Myopic Astigmatism