Thirty Years in an Urban Low Vision Clinic: Changes in Prescribing Habits of Low Vision Practitioners

Crossland, Michael D.; Silver, Janet

doi:10.1097/01.opx.0000171336.40273.3f

Cited by 36 publications

(39 citation statements)

References 10 publications

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“…Majority of our patients considered their problemswith near and distance vision to be of equal importance.However, elderly patients were more likely to deem nearvision as being their major problem; while children hada tendency to judge distance vision as more important.This observation perhaps portrays the additional effectof presbyopia on low vision in the elderly, although itmay also signify that the elderly have a greater likelihoodof central visual loss from macular disease.Posterior segment disease accounted for the majorityof causes of low vision in this study. This correlates withfindings of most low vision clinic studies [6,11,12,[14][15][16][17].In our study,the commonestcause was ARMD which is similar to some previous reports who found age related macular degeneration (ARMD) to bethe commonest cause [11,12,17,18].Besides, there are other reports,specifically from developing countries, in which ARMDwas also not the commonest cause [6,[14][15][16]. Possiblereasons for lower prevalence of ARMD in developingcountries may include nutritional factors, less cigarettesmoking, and lower body mass index (BMI) [21].…”

Section: Discussionsupporting

confidence: 81%

“…This difference in the patternof the age distribution may be a reflection of the oldergeneral populations in developed countries [11,14] andlow life expectancy in developing countries [16].Despite this fact, thedifference may actually be an indication that the [15], and India-2.6:1 [16]. It is, however,different from the pattern in developed countrieswhere more females were found to present for lowvision services [11,12,18]. This probably demonstratesthe reduced access and utilisation of eye care services byfemales in developing countries [19,20].In our study, however, we found that the proportion of females reduced with age,though this trend was not statistically significant.…”

Section: Discussionmentioning

confidence: 99%

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Study profile of patients of Bundelkhand region Presenting with low vision

Kumar¹,

Dwivedi²,

Verma³

et al. 2017

IOSR JDMS

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Background: Low vision is an important public health problem. The purpose of this study was to describe the characteristics of patients attending the medical college ,Jhansi(U.P). Methods: This was a prospective cross sectional study of all new patients seen at the Ophthalmology department, Medical College, Jhansi over a 12 month period. Patients were administered with a structured questionnaire, and were examined and tested with low vision devices by the attending low vision specialist. Information on the demographic and clinical characteristics of the patients was recorded. Results: A total of 150 new patients seen during the period were studied. The mean age was 37.5 years, and their ages ranged between 5 and 80 years with a male to female ratio of 2:1.Patients in the age group of 5-30 yrs were 23.3% , in 26-55 yrs were 35.3% and in 56-80 yrs were 41.3%. The commonest cause of low vision was ARMD(24%); 20% had Corneal opacity ; 18% had Optic atrophy; while only 2% had Non specific maculopathy , macular scars , and macular hole. ARMD ( 17.33%) was the commonest cause in the elderly patients, while amblyopia(6.66%) the commonest in children. Conclusion:The demographic and clinical characteristics of low vision patients seen are similar to that of patients in other developing countries, but different from those in developed countries. Elderly patients and females may be under-utilizing low vision services. There is a need for further research into the determinants of low vision service utilization in developing countries. This would further aid the planning and delivery of services to low vision patients in these countries.

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Section: Discussionsupporting

confidence: 81%

Section: Discussionmentioning

confidence: 99%

Study profile of patients of Bundelkhand region Presenting with low vision

Kumar¹,

Dwivedi²,

Verma³

et al. 2017

IOSR JDMS

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“…However, given the potential for focus groups to become dominated by one or two individuals, and the potentially personal nature of some of the responses to the question asked, it was decided that an individual semistructured interview would be more appropriate. Despite our small sample size, we believe that our study group is representative of patients with macular degeneration; although slightly older than the average patient seen in our low-vision clinic 23 (as patients with diagnoses other than age-related macular disease were excluded), our study population is similar in age to that found in epidemiological studies of prevalence of visual impairment. 24,25 Credibility of our study was assessed by a peer debriefing technique similar to that described by Ohman, 26 whereby the results were presented to a senior optometrist (Rachel Thomas) and a distinguished researcher in vision rehabilitation (GSR).…”

Section: Discussionmentioning

confidence: 87%

Why Did I Lose Vision? A Qualitative Study of Patient Perceptions of the Causes of Age-Related Macular Disease

Crossland

Helman

Feely³

et al. 2007

Visual Impairment Research

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Background: Public understanding of age-related macular degeneration (AMD) is lower than that of other eye diseases such as cataract or glaucoma. The purpose of this study was to determine what reasons people with AMD give for their vision loss. Methods: Fifteen adults with AMD causing significant visual loss performed a detailed one-to-one semi-structured interview. Qualitative analysis techniques were used to identify themes and frequency of responses. Results: Sixty percent (9/15) of the participants identified aging as the principal cause of their vision loss. Two participants (13%) volunteered smoking as being a contributing factor. Common misconceptions included vision loss being attributable to trauma (2/15), medical or surgical intervention (2/15), and overuse of the eyes in earlier life (2/15). No patients mentioned genetic factors as being of importance. Conclusion: Patients with macular disease attribute their vision loss to many factors. Less than two-thirds identify their vision problem as being related to aging. Few appear to be aware of the role of smoking in AMD pathogenesis, and many feel their vision loss is due to medical intervention, trauma, or "using up" their vision. Low-vision practitioners should ensure that patients are correctly counseled as to the cause of their vision loss. Patient education with regard to AMD needs to be made more available in a clinical setting and in health information campaigns. KEYWORDS Age-related macular disease; qualitative research; patient perceptionsAge-related macular disease (AMD) is the major cause of blindness in the United Kingdom and the United States, 1,2 yet public understanding of AMD is lower than that of other eye diseases such as cataract or glaucoma. 3−5 In this exploratory study we used semi-structured interviews to determine why people felt they had developed vision loss caused by AMD.AMD causes central visual field loss due to atrophic or neovascular processes in the macular region of the retina. The only well-established risk factors for AMD are genetic susceptibility, 6 tobacco smoking, 7,8 and increasing age. 9 The role of dietary factors remains controversial, although high doses of vitamin C, vitamin E, and β-carotene may slow progression of AMD in people with moderate or severe AMD. 10 UV exposure has previously been postulated as a risk

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“…A retrospective analysis of patients attending the low vision service at Moorfields Eye Hospital, London, between 1973 and 2003, showed a rapid increase in the percentage of illuminated hand magnifiers being dispensed. 9 The increase was from 10 per cent in 1993 and 30 per cent in 1998 to 80 per cent of hand magnifiers in 2003. Although the percentage of stand magnifiers remained stable over this period, the proportion with internal illumination increased from approximately 50 to 80 per cent.…”

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confidence: 99%

Effect of light‐emitting diode colour temperature on magnifier reading performance of the visually impaired

Wolffsohn

Palmer

Rubinstein

et al. 2012

Clinical and Experimental Optometry

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Background:As light-emitting diodes become more common as the light source for low vision aids, the effect of illumination colour temperature on magnifier reading performance was investigated. Methods: Reading ability (maximum reading speed, critical print size, threshold near visual acuity) using Radner charts and subjective preference was assessed for 107 participants with visual impairment using three stand magnifiers with light emitting diode illumination colour temperatures of 2,700 K, 4,500 K and 6,000 K. The results were compared with distance visual acuity, prescribed magnification, age and the primary cause of visual impairment. Results: Reading speed, critical print size and near visual acuity were unaffected by illumination colour temperature (p > 0.05). Reading metrics decreased with worsening acuity and higher levels of prescribed magnification but acuity was unaffected by age. Each colour temperature was preferred and disliked by a similar number of patients and was unrelated to distance visual acuity, prescribed magnification and age (p > 0.05). Patients had better near acuity (p = 0.002), critical print size (p = 0.034) and maximum reading speed (p < 0.001), and the improvement in near from distance acuity was greater (p = 0.004) with their preferred rather than least-liked colour temperature illumination. Conclusion: A range of colour temperature illuminations should be offered to all visually impaired individuals prescribed with an optical magnifier for near tasks to optimise subjective and objective benefits.

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Thirty Years in an Urban Low Vision Clinic: Changes in Prescribing Habits of Low Vision Practitioners

Cited by 36 publications

References 10 publications

Study profile of patients of Bundelkhand region Presenting with low vision

Study profile of patients of Bundelkhand region Presenting with low vision

Why Did I Lose Vision? A Qualitative Study of Patient Perceptions of the Causes of Age-Related Macular Disease

Effect of light‐emitting diode colour temperature on magnifier reading performance of the visually impaired

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