September 2016
Volume 57, Issue 12
Open Access
ARVO Annual Meeting Abstract  |   September 2016
Correlations between subjective perception of metamorphopsia and objective measurement of metamorphopsia among people with age-related macular degeneration
Author Affiliations & Notes
  • Steven Bae
    Ophthalmology, Queen's University, Kingston, Ontario, Canada
  • Kunyong Xu
    Ophthalmology, Queen's University, Kingston, Ontario, Canada
  • Vasudha Gupta
    Ophthalmology, Queen's University, Kingston, Ontario, Canada
  • Sanjay Sharma
    Ophthalmology, Queen's University, Kingston, Ontario, Canada
  • Footnotes
    Commercial Relationships   Steven Bae, None; Kunyong Xu, None; Vasudha Gupta, None; Sanjay Sharma, None
  • Footnotes
    Support  None
Investigative Ophthalmology & Visual Science September 2016, Vol.57, 4984. doi:
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      Steven Bae, Kunyong Xu, Vasudha Gupta, Sanjay Sharma; Correlations between subjective perception of metamorphopsia and objective measurement of metamorphopsia among people with age-related macular degeneration. Invest. Ophthalmol. Vis. Sci. 2016;57(12):4984.

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      © ARVO (1962-2015); The Authors (2016-present)

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Abstract

Purpose : Metamorphopsia is a hallmark in patients with age-related macular degeneration (AMD). The aim of this study is to assess the correlation between subjectively perceived and objectively measured metamorphopsia among patients with AMD.

Methods : Patients who were diagnosed with AMD at the Department of Ophthalmology, Hotel Dieu Hospital, were invited to participate in this cross-sectional study. Those who had a best-corrected visual acuity (BCVA) of less than 20/200, vitreomacular adhesion, vitreomacular traction, epiretinal membrane, macular hole, macular edema by causes other than AMD, diabetic retinopathy, retinal detachment, previous retinal surgery, glaucoma, amblyopia, or strabismus were excluded. The mean score on a 9-item questionnaire focusing on the symptoms of metamorphopsia was used to capture the patients’ perception of metamorphopsia. M-CHARTS (Inami, Japan) was used to quantify the metamorphopsia. The examination distance was 30 centimeters, and the refraction of the eye was adjusted to this distance. Patients’ metamorphopsia was scored horizontally (MH) and vertically (MV). The examination was repeated 3 times, and the mean value was used for data analysis.

Results : In total, 30 eyes (53.3% wet AMD and 46.7% dry AMD) of 30 patients were included. The patients were Caucasian (100%) and female predominant (63.3%) with a mean age of 77.0 years (SD= 8.30). The BCVA for near and for distance was 0.50 logMAR (SD=0.27) and 0.49 logMAR (SD=0.25), respectively. The most frequently reported metamorphopsia included distortion when reading a book, newspaper, or display on a computer screen (63.3%), distortion of frames of windows or bookshelves (33.3%), distortion of lines of tiles on the bathroom wall (33.3%), distortion of the lines of a crosswalk or the steps of an overpass (30%), and distortion of telephone poles or trees (26.7%). The mean score for MV and MH was 0.37 (SD=0.27) and 0.40 (SD=0.32), respectively. Both MV (r1) and MH (r2) scores were associated with the mean score of the subjective perception of metamorphopsia (Spearman rank correlation: r1=0.70, p<0.0001; and r2=0.64, p=0.0001, respectively).

Conclusions : Patients’ subjective perceptions of metamorphopsia were correlated with metamorphopsia measured using M-CHARTS. Objective measurements of metamorphopsia via M-CHARTS may be an important variable to follow.

This is an abstract that was submitted for the 2016 ARVO Annual Meeting, held in Seattle, Wash., May 1-5, 2016.

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