Accuracy of the Potential Acuity Meter in Predicting the Visual Outcome in Cases of Cataract Associated with Macular Degeneration

Alió, J. L.; Artola, Alberto; Ruiz-Moreno, José M.; Mm, Ismail; Mj, Ayala

doi:10.1177/112067219300300403

Cited by 17 publications

(8 citation statements)

References 8 publications

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“…At their most simple, these include colour detection and the use of entoptic phenomena—Haidinger’s brushes, Purkinje images, and blue field phenomena 36. More sophisticated techniques include the use of interferometers,37 38 potential acuity meters,14 39 focal electroretinograms,40 and measurement of oscillatory displacement thresholds 41. The great variety of instruments and approaches reflects their disappointing performance.…”

Section: Discussionmentioning

confidence: 99%

Do patients with age related maculopathy and cataract benefit from cataract surgery?

Shuttleworth

Luhishi

Harrad

1998

British Journal of Ophthalmology

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Aims-To assess the benefits of cataract extraction in patients with age related maculopathy (ARM). Methods-1073 randomly selected cataract operations were reviewed and 99 cases of preoperatively recognised ARM were identified for investigation. Data relating to visual function were retrieved from case notes, and patient responses to a questionnaire were analysed. Results-98% had dry or unspecified ARM. Only 2% had exudative maculopathy. 81% of cases had an improvement in best distance acuity; mean change 0.44 logMAR (change of 6/36 to 6/12). 65% responded to the questionnaire; 67% felt that the operation had been worthwhile, 17% had mixed feelings, and 17% thought it not worthwhile. Conclusion-This study, which is the first of its kind to be reported, shows a clear benefit from cataract surgery in the majority of patients with ARM. However, the prevalence of ARM in this study is lower than expected, suggesting that some patients with both ARM and cataract were not listed for surgery. The design of a prospective study to quantify the subjective and objective benefits of cataract surgery in these patients is outlined and predictors of successful outcome identified. This will promote the development of guidelines for the surgical management of this group of patients. (Br J Ophthalmol 1998;82:611-616) Age related maculopathy (ARM) aVects approximately 40% of those over the age of 75 years.1 2 It is the most common maculopathy to aVect individuals with cataract, the two conditions occurring with increasing frequency with age.3 4 ARM currently contributes to around 50% of all those registered as blind and partially sighted in England and Wales 5 and a recent study has suggested that the condition may be becoming more prevalent. Although this proportion is rather lower than would be expected from prevalence data, this still constitutes around 100 000 operations in the USA and 10 000 operations in the UK each year. When treating a patient with ARM and cataract the clinician must decide whether cataract surgery will be of benefit, a decision that is often diYcult to make. Sometimes the patient is listed for surgery on the grounds that there is little to lose. However, the constraints of tight budgets and waiting lists, and the need to target resources, means that medical practice must be evidence based and it is therefore necessary to have reliable data to support the decision of whether or not to operate.Although previous investigators have identified factors associated with poor outcome following cataract surgery, including the patient age and ocular co-morbidity (especially ARM), 9-16 none has addressed specifically the benefits of surgery in these high risk groups.We have performed a retrospective analysis of case notes and circulated a self completion questionnaire in order to determine whether patients with ARM benefit from cataract surgery both in terms of visual function and patient satisfaction. In addition, we attempted to identify predictors of benefit and to determine whether we are operating on ap...

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Section: Discussionmentioning

confidence: 99%

Do patients with age related maculopathy and cataract benefit from cataract surgery?

Shuttleworth

Luhishi

Harrad

1998

British Journal of Ophthalmology

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“…Tharp et al concluded that the PAM does not predict final visual acuity accurately 9 with Cuzzani et al reporting a mild correlation ( r = 0.49) between PAM and final visual acuity 4 . The studies by Lasa et al 7 and Alio et al 8 , however, found PAM results useful in moderate cataract. Those with the more favourable results studied cases where the fundus was visible or there was no other ocular pathology present.…”

Section: Introductionmentioning

confidence: 98%

“…Mentor have acknowledged that the PAM is not accurate if the preoperative visual acuity is worse than 6/60 6 . Later studies have equivocal conclusions 4,7–11 . Tharp et al concluded that the PAM does not predict final visual acuity accurately 9 with Cuzzani et al reporting a mild correlation ( r = 0.49) between PAM and final visual acuity 4 .…”

Section: Introductionmentioning

confidence: 99%

Potential acuity meter results in cataract patients

Devereux

Rando

Wagstaff

et al. 2000

Clinical Exper Ophthalmology

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“…Although many studies have investigated the use of the PAM test as a predictor of postcataract surgery visual outcomes, none of them have properly evaluated this test in the specific population included in our study. [ 1 4 7 8 9 10 11 12 13 ] The aim of this study is to investigate the reliability and accuracy of the PAM test in predicting the visual outcomes in patients with moderate cataracts and inactive treated maculopathies.…”

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confidence: 99%

Predicting postoperative visual outcomes in cataract patients with maculopathy

Macky

Mohamed

Emarah

et al. 2015

Indian J Ophthalmol

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Purpose:To assess the accuracy of the potential acuity meter (PAM) in predicting postcataract surgery visual acuity outcome in patients with healed inactive maculopathies.Study Design:Prospective interventional clinical trial.Patients and Methods:Patients scheduled for phacoemulsification had preoperative and 1 month postoperative best-corrected visual acuity (BCVA), PAM test, fluorescein angiography, and macular optical coherence tomography. Patients were grouped to following preoperative BCVA: PRE1: 0.29 and better, PRE2: 0.25–0.13, and PRE3: 0.1 or worse; age: G1 <60, G2 = 60–70, and G3 >70 years. PAM accuracy was divided into: Grade 1: Postoperative BCVA ≤1 or less line error of the PAM score, Grade 2: Between 1 and 2 lines error, and Grade 3: ≥3 lines or more error.Results:This study enrolled 57 patients with a mean age of 71.05 ± 6.78 years where 34 were females. There were 21 (36.84%) patients with diabetic maculopathy and 36 (63.16%) with age-related macular degeneration. The mean preoperative BCVA was 0.198 ± 0.12 (0.1–0.5). The mean PAM score was 0.442 ± 0.24 (0.1–1.3). The mean postoperative BCVA was 0.4352 ± 0.19 (0.17–1.00). The PAM score was in Grade 1, 2, and 3 in 46 (80.7%), 54 (94.7%), and 56 (98.2), respectively. There was a highly significant correlation between the PAM score and the postoperative BCVA (P < 0.001, Chi-square test). There was no correlation between the PAM test accuracy and age, gender, diagnosis, and preoperative BCVA (P = 0.661, 0.667, 0. 0.991, 0.833, Chi-square test; respectively).Conclusion:The PAM is an accurate method of predicting postoperative visual acuity for eyes with nuclear cataracts Grade I and II and inactive maculopathies.

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Accuracy of the Potential Acuity Meter in Predicting the Visual Outcome in Cases of Cataract Associated with Macular Degeneration

Cited by 17 publications

References 8 publications

Do patients with age related maculopathy and cataract benefit from cataract surgery?

Do patients with age related maculopathy and cataract benefit from cataract surgery?

Potential acuity meter results in cataract patients

Predicting postoperative visual outcomes in cataract patients with maculopathy

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