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Modified images reflecting effects of age-related macular degeneration on perception of everyday scenes
Denniss, Jonathan Astle, A.T.
Denniss, Jonathan
Astle, A.T.
Publication Date
2018
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© 2018 Wiley. This is the peer-reviewed version of the following article: Denniss J and Astle JT (2018) Modified images reflecting effects of age-related macular degeneration on perception of everyday scenes. Clinical and Experimental Optometry. Accepted for publication, which has been published in final form at 10.1111/cxo.12672. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.
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openAccess
Accepted for publication
2018-01-07
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Abstract
Depictions of vision with AMD in public information material typically show a central region of
absolute vision loss. Patients with early and moderate disease frequently do not report this. We
aimed to measure how a group of people with AMD perceive everyday scenes in order to produce
accurate depictions.
We report on six people aged 65-82 years with monocular AMD (visual acuity +0.04 to +1.64
logMAR) and normal vision in the fellow eye. Participants viewed 4 images monocularly,
alternating between eyes. The image was digitally altered to approximate participants’ descriptions
of their perception with the affected eye. The altered image was viewed with the unaffected eye,
and compared with the original image viewed with the affected eye. This was repeated iteratively
until a perceptual match was achieved between the modified image/unaffected eye and the original
image/affected eye.
For five AMD participants with visual acuity +0.04 to +0.50 logMAR the modified images did not
resemble those in current public information material. Image modifications required to achieve
perceptual similarity with the affected eyes included localised distortion, contrast reduction and
blur. Widespread colour desaturation was also required in some cases. One participant with
advanced geographic atrophy reported an absolute positive scotoma, similar to existing depictions.
Vision in people with AMD may not conform to the common depiction of a central region of
absolute vision loss. The accurate representations of AMD patients’ vision produced in this study
will enable better understanding of the visual consequences of AMD.
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Accepted manuscript
Citation
Denniss J and Astle JT (2018) Modified images reflecting effects of age-related macular degeneration on perception of everyday scenes. Clinical and Experimental Optometry. Accepted for publication.
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