| Accommodative Response/Stimulus by Dynamic Retinoscopy: Near Add Guidelines. | |
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MedLine Citation:
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PMID: 22940782 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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PURPOSE.: Monocular estimation method (MEM) dynamic retinoscopy and low neutral (LN) dynamic retinoscopy are common procedures for evaluating the need for near-point plus adds for improved near-point performance in non-presbyopes. A combination of MEM and LN has been suggested to be a method of plotting accommodative response/accommodative stimulus functions and evaluating guidelines for prescribing from MEM. METHODS.: Using a combined MEM-LN procedure, MEM was performed on 80 young adults at 40 cm, with distance correction and with plus adds in 0.25 D steps up to and including +2.00 D. Modified Thorington dissociated phorias were also performed with each of the plus adds. Subjects picked a preferred add, which subjectively made print easiest and most comfortable to read. RESULTS.: The mean preferred add was +0.58 D over the distance prescription. The add derived from subtracting 0.25 D from the lag of accommodation with distance correction averaged 0.10 D more plus than the preferred add. The add at which dynamic retinoscopy showed a "with" motion of 0.25 D averaged 0.54 more plus than the preferred add. The add at which dynamic retinoscopy showed a "with" motion of 0.50 D averaged 0.16 more plus than the preferred add. CONCLUSIONS.: Adds derived from subtracting 0.25 D from the lag with distance correction and from finding the add that yields 0.50 D of "with" motion compared favorably with the preferred adds on average, but the standard deviations of the differences were high. Those guidelines could be reasonable starting points for the prescription of near-point plus adds for non-presbyopes, but follow-up testing to confirm or adjust add power would be advisable in the clinical setting. |
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Authors:
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David A Goss; Sania Rana; Julie Ramolia |
Publication Detail:
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Type: JOURNAL ARTICLE Date: 2012-8-30 |
Journal Detail:
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Title: Optometry and vision science : official publication of the American Academy of Optometry Volume: - ISSN: 1538-9235 ISO Abbreviation: Optom Vis Sci Publication Date: 2012 Aug |
Date Detail:
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Created Date: 2012-9-3 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8904931 Medline TA: Optom Vis Sci Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Affiliation:
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School of Optometry, Indiana University, Bloomington, Indiana (DAG, SR, JR). |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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