Tags

Type your tag names separated by a space and hit enter

Nuclear cataract and myopic shift in refraction.

Abstract

PURPOSE

Nuclear cataract is thought to cause a myopic shift in refraction in older persons. The authors tested this hypothesis by assessing the correlation of nuclear opacity with spherical equivalent refraction (SER) in an older population.

DESIGN

Population-based cross-sectional study.

METHODS

Three thousand six hundred and fifty-four participants aged 49 years or older were examined in the Blue Mountains Eye Study [BMES] (1992 to 1994). Eye examinations included subjective refraction and lens photographs. Nuclear opacity was assessed against four standard slit-lamp lens photographs using the Wisconsin Cataract Grading System. Nuclear cataract was defined as opacity level 4 or higher.

RESULTS

Participants without nuclear cataract had an annual mean hyperopic shift of 0.05 diopters (P < .0001). In persons with nuclear cataract, this hyperopic shift disappeared. A myopic refractive shift occurred only in persons with nuclear opacity levels of 4 or higher.

CONCLUSION

This study documents the contribution of nuclear cataract to the mild myopic shift that neutralizes the age-related hyperopic shift occurring in older persons.

Links

  • Publisher Full Text
  • Authors+Show Affiliations

    ,

    Centre for Vision Research, Department of Ophthalmology, Westmead Millennium Institute, University of Sydney, Sydney, Australia.

    , , ,

    Source

    American journal of ophthalmology 144:3 2007 Sep pg 457-9

    MeSH

    Aged
    Aged, 80 and over
    Aging
    Cataract
    Cross-Sectional Studies
    Female
    Humans
    Hyperopia
    Lens Nucleus, Crystalline
    Male
    Middle Aged
    Myopia
    New South Wales
    Refraction, Ocular

    Pub Type(s)

    Journal Article
    Research Support, Non-U.S. Gov't

    Language

    eng

    PubMed ID

    17765431

    Citation

    Samarawickrama, Chameen, et al. "Nuclear Cataract and Myopic Shift in Refraction." American Journal of Ophthalmology, vol. 144, no. 3, 2007, pp. 457-9.
    Samarawickrama C, Wang JJ, Burlutsky G, et al. Nuclear cataract and myopic shift in refraction. Am J Ophthalmol. 2007;144(3):457-9.
    Samarawickrama, C., Wang, J. J., Burlutsky, G., Tan, A. G., & Mitchell, P. (2007). Nuclear cataract and myopic shift in refraction. American Journal of Ophthalmology, 144(3), pp. 457-9.
    Samarawickrama C, et al. Nuclear Cataract and Myopic Shift in Refraction. Am J Ophthalmol. 2007;144(3):457-9. PubMed PMID: 17765431.
    * Article titles in AMA citation format should be in sentence-case
    TY - JOUR T1 - Nuclear cataract and myopic shift in refraction. AU - Samarawickrama,Chameen, AU - Wang,Jie Jin, AU - Burlutsky,George, AU - Tan,Ava G, AU - Mitchell,Paul, PY - 2007/03/30/received PY - 2007/05/03/revised PY - 2007/05/03/accepted PY - 2007/9/4/pubmed PY - 2007/9/25/medline PY - 2007/9/4/entrez SP - 457 EP - 9 JF - American journal of ophthalmology JO - Am. J. Ophthalmol. VL - 144 IS - 3 N2 - PURPOSE: Nuclear cataract is thought to cause a myopic shift in refraction in older persons. The authors tested this hypothesis by assessing the correlation of nuclear opacity with spherical equivalent refraction (SER) in an older population. DESIGN: Population-based cross-sectional study. METHODS: Three thousand six hundred and fifty-four participants aged 49 years or older were examined in the Blue Mountains Eye Study [BMES] (1992 to 1994). Eye examinations included subjective refraction and lens photographs. Nuclear opacity was assessed against four standard slit-lamp lens photographs using the Wisconsin Cataract Grading System. Nuclear cataract was defined as opacity level 4 or higher. RESULTS: Participants without nuclear cataract had an annual mean hyperopic shift of 0.05 diopters (P < .0001). In persons with nuclear cataract, this hyperopic shift disappeared. A myopic refractive shift occurred only in persons with nuclear opacity levels of 4 or higher. CONCLUSION: This study documents the contribution of nuclear cataract to the mild myopic shift that neutralizes the age-related hyperopic shift occurring in older persons. SN - 0002-9394 UR - https://www.unboundmedicine.com/medline/citation/17765431/full_citation L2 - https://linkinghub.elsevier.com/retrieve/pii/S0002-9394(07)00435-7 DB - PRIME DP - Unbound Medicine ER -