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The Impact of Lens Vault on Visual Acuity and Refractive Error: Implications for Management of Primary Angle-closure Glaucoma.

Publication ,  Journal Article
Nongpiur, ME; Singhal, S; Stewart, S; Htoon, HM; Narayanaswamy, AK; Wong, TY; Perera, SA; Aung, T
Published in: J Glaucoma
March 2016

PURPOSE: To investigate the relationship between lens vault (LV), visual acuity (VA), and refraction. METHODS: This was a cross-sectional study of 2047 subjects aged 50 years and older recruited from a community polyclinic. Anterior segment optical coherence tomography was performed, and customized software was used to measure LV. VA was measured using a logarithm of minimum angle of resolution chart (logMAR chart; Lighthouse Inc.), and was classified as normal (logMAR<0.3), mild impairment (0.30.6). Refraction was measured with an autorefractor machine and spherical equivalent was defined as sphere plus half cylinder. Angle closure was defined as posterior trabecular meshwork not visible for ≥2 quadrants on nonindentation gonioscopy. RESULTS: Complete data were available for 1372 subjects including 295 (21.5%) with angle closure. Angle-closure subjects were significantly older (P<0.001), with shorter axial length (P<0.001), shallower anterior chamber depth (P<0.001), and greater LV (P<0.001). There was no significant difference in VA (P=0.12) compared with those without angle closure. After adjusting for age, sex, axial length, anterior chamber depth, and spherical equivalent, there was no significant association between LV and VA (P=0.35) or between LV and spherical equivalent (P=0.06). CONCLUSIONS: The magnitude of LV was not associated with VA or spherical equivalent. Lens extraction may be a consideration in eyes with angle closure with large LV in the absence of visually significant cataract.

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Published In

J Glaucoma

DOI

EISSN

1536-481X

Publication Date

March 2016

Volume

25

Issue

3

Start / End Page

e236 / e240

Location

United States

Related Subject Headings

  • Visual Acuity
  • Tomography, Optical Coherence
  • Refractive Errors
  • Refraction, Ocular
  • Ophthalmology & Optometry
  • Middle Aged
  • Male
  • Lens Diseases
  • Iris
  • Iridectomy
 

Citation

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Nongpiur, M. E., Singhal, S., Stewart, S., Htoon, H. M., Narayanaswamy, A. K., Wong, T. Y., … Aung, T. (2016). The Impact of Lens Vault on Visual Acuity and Refractive Error: Implications for Management of Primary Angle-closure Glaucoma. J Glaucoma, 25(3), e236–e240. https://doi.org/10.1097/IJG.0000000000000264
Nongpiur, Monisha E., Shweta Singhal, Stephen Stewart, Hla M. Htoon, Arun K. Narayanaswamy, Tien Y. Wong, Shamira A. Perera, and Tin Aung. “The Impact of Lens Vault on Visual Acuity and Refractive Error: Implications for Management of Primary Angle-closure Glaucoma.J Glaucoma 25, no. 3 (March 2016): e236–40. https://doi.org/10.1097/IJG.0000000000000264.
Nongpiur ME, Singhal S, Stewart S, Htoon HM, Narayanaswamy AK, Wong TY, et al. The Impact of Lens Vault on Visual Acuity and Refractive Error: Implications for Management of Primary Angle-closure Glaucoma. J Glaucoma. 2016 Mar;25(3):e236–40.
Nongpiur, Monisha E., et al. “The Impact of Lens Vault on Visual Acuity and Refractive Error: Implications for Management of Primary Angle-closure Glaucoma.J Glaucoma, vol. 25, no. 3, Mar. 2016, pp. e236–40. Pubmed, doi:10.1097/IJG.0000000000000264.
Nongpiur ME, Singhal S, Stewart S, Htoon HM, Narayanaswamy AK, Wong TY, Perera SA, Aung T. The Impact of Lens Vault on Visual Acuity and Refractive Error: Implications for Management of Primary Angle-closure Glaucoma. J Glaucoma. 2016 Mar;25(3):e236–e240.

Published In

J Glaucoma

DOI

EISSN

1536-481X

Publication Date

March 2016

Volume

25

Issue

3

Start / End Page

e236 / e240

Location

United States

Related Subject Headings

  • Visual Acuity
  • Tomography, Optical Coherence
  • Refractive Errors
  • Refraction, Ocular
  • Ophthalmology & Optometry
  • Middle Aged
  • Male
  • Lens Diseases
  • Iris
  • Iridectomy