Computational aspects of the visual Strehl ratio

Iskander, D. Robert (2006) Computational aspects of the visual Strehl ratio. Optometry and Vision Science, 83(1), pp. 57-59.


Purpose. The recently defined visual Strehl ratio that is based on the optical transfer function (VSOTF) has a number of previously unidentified limitations in its calculation that need to be addressed. Method. The VSOTF is complex, not bounded between zero and one, and can be negative. It is also very sensitive to the presence of prisms in the wavefront aberration. Current reports using the visual Strehl ratio for objectively assessing visual performance use its real part in the analyses. This leads to a metric that differs from the visual Strehl ratio based on the modulation transfer function (VSMTF), even in the case of rotationally symmetric aberrations. Results. An augmented visual Strehl ratio is proposed that overcomes the limitations of its predecessor. Conclusions. The augmented metric is more robust in the presence of a residual prism than the VSOTF, and it shows in a preliminary study that it could lead to better correlations with visual performance, especially in the presence of larger aberrations.

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23 citations in Web of Science®

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ID Code: 3635
Item Type: Journal Article
Refereed: Yes
Additional Information: The contents of this journal can be freely accessed online via the journal's web page (see hypertext link) 12 months after publication. For more information, please refer to the journal’s website or contact the author. Author contact details:
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Keywords: objective assessment of vision, visual quality metrics, visual acuity
ISSN: 1538-9235
Subjects: Australian and New Zealand Standard Research Classification > MEDICAL AND HEALTH SCIENCES (110000) > OPTOMETRY AND OPHTHALMOLOGY (111300) > Vision Science (111303)
Divisions: Past > QUT Faculties & Divisions > Faculty of Built Environment and Engineering
Current > QUT Faculties and Divisions > Faculty of Health
Current > Institutes > Institute of Health and Biomedical Innovation
Copyright Owner: Copyright 2006 Lippincott, Williams & Wilkins
Deposited On: 02 Mar 2006 00:00
Last Modified: 29 Feb 2012 13:25

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