The Photostress Recovery Test in the Clinical Assessment of Visual Function

Glaser, Joel S.; Savino, Peter J.; Sumers, Karen D.; McDonald, Susan A.; Knighton, Robert W.

doi:10.1016/0002-9394(77)90624-9

Cited by 101 publications

(48 citation statements)

References 8 publications

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“…19 PSRT has been used as a quantitative measure of macular function. 10 The photostress response has been explained as a transient state of visual insensitivity caused by bleaching of the visual pigments. Return of sensitivity is dependent on re-synthesis of the visual pigmentFthis requires adequate perfusion of the photoreceptors and RPE.…”

Section: Discussionmentioning

confidence: 99%

“…Photo stress recovery time 10 With undilated pupils and the other eye covered, the patient looked directly into the light of a handheld ophthalmoscope held about 3 cm away from the eye to be tested for a period of 10 s. Immediately after the light was removed, the patient was asked to start reading Snellen test letters one line larger than the BCVA. The time (in seconds) required to read any three of the test letters just larger than the BCVA (ie, PSRT) was recorded.…”

Section: Methodsmentioning

confidence: 99%

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Functional outcome of subthreshold versus threshold diode laser photocoagulation in diabetic macular oedema

Kumar

Ghosh

Mehta

et al. 2010

Eye

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Aims: To compare the efficacy of subthreshold diode laser photocoagulation with conventional threshold diode laser in clinically significant macular oedema (CSME) in diabetics. Methods: Prospective randomised controlled trial. Thirty eyes of 20 patients with CSME having central macular thickness (CMT) X250 lm on optical coherence tomography (OCT) and best corrected Snellen visual acuity (BCVA) of 20/80 or better were randomly assigned to receive subthreshold diode laser (group A) or threshold laser (group B). The clinical course of BCVA, CMT on OCT, photo stress recovery time (PSRT), contrast sensitivity (CS) using Pelli Robson chart, and central visual field (10-2 VF, Humphrey Field Analyser II) were monitored regularly for 18 weeks after intervention. Results: Both groups showed significant (P ¼ 0.03) and comparable improvement in mean BCVA at 18 weeks visit. There were also significant and comparable reductions (Po0.01) in mean CMT at all visits compared with baseline in both groups. PSRT and CS (75±16 (mean±SD) and 0.72±0.3 in group A and 81±12 and 0.68±0.2 in group B pre-laser) were significantly better in group A at the final visit (66±17 and 1.04±0.3) as compared to group B (78 ± 11 and 0.73 ± 0.3). One patient in group B showed a paracentral scotoma on 10-2 VF after the laser, which persisted till the end of follow-up. Conclusion: Subthreshold diode laser photocoagulation is as effective as conventional threshold laser in reducing or eliminating diabetic macular oedema (on OCT) and in improving BCVA. Recovery of macular function as assessed by CS and PSRT maybe better with subthreshold laser.

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Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Functional outcome of subthreshold versus threshold diode laser photocoagulation in diabetic macular oedema

Kumar

Ghosh

Mehta

et al. 2010

Eye

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“…Any deviation from normal retinal function will manifest as a prolonged recovery time. Lovie-Kitchin and Bowman 84 and others 40,96,107,108 have described similar clinically-applicable approaches: the time to recover high or low contrast VA to one line above threshold after exposure to a glare source of known illuminance, usually viewed through a translucent opal filter, for a set exposure time is recorded. It is relatively easy for practitioners to establish a quick, easy and reproducible protocol to measure glare recovery for their own use and to determine normal values to validate their measurements with older patients.…”

Section: Glare Recoverymentioning

confidence: 99%

Assessment of age‐related maculopathy using subjective vision tests

Lovie‐Kitchin

Feigl

2005

Clinical and Experimental Optometry

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This paper reviews non-standard, clinical vision tests that may be used to detect the earliest visual loss in age-related maculopathy (ARM), before fundus changes are detected. We recommend a clinical test battery for all patients aged 60 years and older, comprising low luminance/low contrast (SKILL) VA or low contrast VA, desaturated D-15 colour vision assessment, flicker perimetry, glare recovery and dark adaptation if possible, together with conventional assessments of case history, ophthalmoscopy and high contrast visual acuity (VA) for the detection and diagnosis of ARM. Reading rate is also discussed as a potential indicator of early visual loss. For monitoring the progressive visual loss in age-related macular degeneration (AMD) and determining the requirements for optometric vision rehabilitation, we recommend more conventional clinical vision tests of distance and near visual acuity, reading rate, the effects of varying illumination and a functional central visual field assessment.

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“…28 Normal recovery is dependent on the underlying retinal photoreceptor and pigment epithelium function. 29 The Macular Degeneration Detector (MDD-2) is a novel flash photostress recovery device. This device has previously been shown to be capable of detecting functional vision loss in age-related macular degeneration and diabetic maculopathy.…”

Section: Suitability and Repeatability Of A Photostress Recovery Testmentioning

confidence: 99%

Suitability and Repeatability of a Photostress Recovery Test Device, the Macular Degeneration Detector (Mdd-2), for Diabetes and Diabetic Retinopathy Assessment

Loughman

Ratzlaff

Foerg³

et al. 2014

Retina

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The Photostress Recovery Test in the Clinical Assessment of Visual Function

Cited by 101 publications

References 8 publications

Functional outcome of subthreshold versus threshold diode laser photocoagulation in diabetic macular oedema

Functional outcome of subthreshold versus threshold diode laser photocoagulation in diabetic macular oedema

Assessment of age‐related maculopathy using subjective vision tests

Suitability and Repeatability of a Photostress Recovery Test Device, the Macular Degeneration Detector (Mdd-2), for Diabetes and Diabetic Retinopathy Assessment

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