Ophthalmic and Physiological Optics (OPO)

OPO - a leading international journal for contemporary research in vision science and optometry

OPO is the research journal of The College of Optometrists. It is read and cited around the world, and helps clinicians and educators stay up to date with the latest research findings on the development, use and restoration of vision.

What's in the latest issue of OPO?

OPO is published six times a year. Here are some highlights from the January 2022 issue of OPO

The validity of point of care tear film osmometers in the diagnosis of dry eye

Tavakoli et al. (2021)

This study sought to determine the repeatability of TearLab and I-PEN osmometers in vivo and their accuracy in vitro. The authors found that test-retest variability of TearLab and I-PEN is large compared to currently recommended diagnostic criteria; single measurements of osmolarity are unreliable as a basis for the clinical diagnosis of dry eye; and the TearLab osmometer is reasonably accurate in-vitro - observed inaccuracies with I-PEN in-vitro may be due to measurement conditions.

Developing consensus-based referral criteria for low vision services in Australia

Alam et al. (2021)

In this study, the authors developed expert consensus on referral criteria for low vision services in Australia and produced three consensus-based recommendations, which will assist health care professionals to provide appropriate, timely and person-centred referral for low vision services. The utilisation of consensus-based referral recommendations could increase access and uptake of low vision services, which are known to improve quality of life for people with vision impairment.

Novel use of a Franklin split lens for cycling with hemianopia

Crossland et al. (2021)

Optical rehabilitation for hemianopia includes the prescription of partial aperture prismatic lenses. In this case study, the authors present an alternative lens type, which does not reduce contrast sensitivity and which can be made in plastic materials. They found that a rotated Franklin split bifocal lens expands the visual field in hemianopia, by incorporating base out prism over the temporal portion of the lens, and can be used for the optical rehabilitation of hemianopia.


Design and validation of a chart-based measure of the limits of spatial contrast sensitivity

Adhikari et al (2021)

Current chart-based tests of spatial contrast sensitivity (SCS) with fixed or narrow frequency ranges cannot characterise the limits of spatial contrast vision. In this study, the authors present the design and validation of an open-access, language-independent, chart-based measure of the spatial contrast sensitivity envelope. The combined spatial contrast and visual acuity chart provides a rapid and reliable measure of the limits of spatial vision for application in the clinic and research. The chart is suitable for the detection of initial subtle vision changes in disease.

Visit OPO online

College members can access full issues of OPO, browse previous articles, and search for a particular topic or keyword on the publisher’s website, Wiley Online Library (WOL).

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OPO is now available for members to access on the new WOL app using their College login. The app is available in iOS and Android formats.

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