ORCID Profile
0000-0003-3574-8396
Current Organisations
University of Plymouth
,
Texas A&M University
,
Indiana University Bloomington
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Publisher: Cold Spring Harbor Laboratory
Date: 07-01-2023
DOI: 10.1101/2023.01.05.23284206
Abstract: To evaluate visual fields using Zippy Adaptive Thresholding Algorithm (ZATA) Standard and ZATA Fast among patients with glaucoma and healthy in iduals. We recruited 22 healthy participants and 55 patients with glaucoma from the ophthalmology clinics at Kasturba Hospital, Manipal, India. Inclusion criteria were age 35 to 85 years, best corrected visual acuity (BCVA) 0.3 logMAR or better. Glaucoma patients had characteristic glaucomatous optic disc damage. All participants were free from any other ocular pathology except from mild cataract. Participants performed ZATA Standard and ZATA Fast tests on a Henson 9000 perimeter and Swedish Interactive Thresholding Algorithm (SITA) Standard and SITA Fast tests on a Humphrey Field Analyser. Tests were repeated within 90 days to evaluate the test-retest variability. The mean difference in the mean deviation (MD) values of ZATA Standard and SITA Standard tests was 1.7 dB, and that in ZATA Fast and SITA Fast tests was 0.9 dB. The sensitivity values of ZATA and SITA tests differed by 3 dB. ZATA Standard and ZATA Fast were 30% and 6% faster than the corresponding SITA tests. Grayscale and probability maps varied slightly between the four tests but represented a similar visual field for most patients in the study. ZATA Standard and ZATA Fast are suitable for clinical practice. However, differences between ZATA and SITA tests suggest that they should not be used interchangeably when monitoring over time.
Publisher: American Association for the Advancement of Science (AAAS)
Date: 24-06-2022
Abstract: Comparative studies of mortality in the wild are necessary to understand the evolution of aging yet, ectothermic tetrapods are underrepresented in this comparative landscape, despite their suitability for testing evolutionary hypotheses. We present a study of aging rates and longevity across wild tetrapod ectotherms, using data from 107 populations (77 species) of nonavian reptiles and hibians. We test hypotheses of how thermoregulatory mode, environmental temperature, protective phenotypes, and pace of life history contribute to demographic aging. Controlling for phylogeny and body size, ectotherms display a higher ersity of aging rates compared with endotherms and include phylogenetically widespread evidence of negligible aging. Protective phenotypes and life-history strategies further explain macroevolutionary patterns of aging. Analyzing ectothermic tetrapods in a comparative context enhances our understanding of the evolution of aging.
Publisher: Wiley
Date: 09-2014
DOI: 10.1111/ECOG.00783
Publisher: Association for Research in Vision and Ophthalmology (ARVO)
Date: 2012
DOI: 10.1167/12.11.22
Abstract: Perimeters are commercially available instruments for measuring various attributes of the visual field in a clinical setting. They have several advantages over traditional lab-based systems for conducting vision experiments, including built-in gaze tracking and calibration, polished appearance, and attributes to increase participant comfort. Prior to this work, there was no standard to control such instruments, making it difficult and time consuming to use them for novel psychophysical experiments. This paper introduces the Open Perimetry Interface (OPI), a standard set of functions that can be used to control perimeters. Currently the standard is partially implemented in the open-source programming language R on two commercially available instruments: the Octopus 900 (a projection-based bowl perimeter produced by Haag-Streit, Switzerland) and the Heidelberg Edge Perimeter (a CRT-based system produced by Heidelberg Engineering, Germany), allowing these instruments to be used as a platform for psychophysical experimentation.
Publisher: Association for Research in Vision and Ophthalmology (ARVO)
Date: 06-2006
DOI: 10.1167/IOVS.05-1419
Abstract: To compare the reliability, validity, and responsiveness of the Mars Letter Contrast Sensitivity (CS) Test to the Pelli-Robson CS Chart. One eye of 47 normal control subjects, 27 patients with open-angle glaucoma, and 17 with age-related macular degeneration (AMD) was tested twice with the Mars test and twice with the Pelli-Robson test, in random order on separate days. In addition, 17 patients undergoing cataract surgery were tested, once before and once after surgery. The mean Mars CS was 1.62 log CS (0.06 SD) for normal subjects aged 22 to 77 years, with significantly lower values in patients with glaucoma or AMD (P<0.001). Mars test-retest 95% limits of agreement (LOA) were +/-0.13, +/-0.19, and +/-0.24 log CS for normal, glaucoma, and AMD, respectively. In comparison, Pelli-Robson test-retest 95% LOA were +/-0.18, +/-0.19, and +/-0.33 log CS. The Spearman correlation between the Mars and Pelli-Robson tests was 0.83 (P<0.001). However, systematic differences were observed, particularly at the upper-normal end of the range, where Mars CS was lower than Pelli-Robson CS. After cataract surgery, Mars and Pelli-Robson effect size statistics were 0.92 and 0.88, respectively. The results indicate the Mars test has test-retest reliability equal to or better than the Pelli-Robson test and comparable responsiveness. The strong correlation between the tests provides evidence the Mars test is valid. However, systematic differences indicate normative values are likely to be different for each test. The Mars Letter CS Test is a useful and practical alternative to the Pelli-Robson CS Chart.
Location: United Kingdom of Great Britain and Northern Ireland
No related grants have been discovered for Paul Artes.