Quantification and Measurement of Human Lens Opacities Using the Lens Opacity Meter

Costagliola, Ciro; Iuliano, Giuseppe; Marino, Edgardo; Paolercio, F.; Trapanese, A.; Apponibattini, G

doi:10.1159/000310124

Cited by 13 publications

(10 citation statements)

References 3 publications

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“…As the lens opacities in this series were mostly nuclear, especially early nuclear, and mixed, LOM seemed to be a suitable instrument for this study, although it measures opacities in the central portion of the lens only, not in the whole lens. LOM does not measure posterior subcapsular cataract (Costagliola et al 1990;Stoltenberg et al 1989); that was evaluated clinically.…”

mentioning

confidence: 99%

Lens opacity in unilateral exfoliation syndrome with or without glaucoma

Puska

1994

Acta Ophthalmologica

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The exfoliation syndrome as a risk factor for lens opacification was investigated with pairwise comparisons of lens opacity, visual acuity, refraction, and anterior chamber depth in 126 eyes of 63 patients with unilateral exfoliation syndrome, and in 84 eyes of 42 patients with unilateral capsular glaucoma. As compared with fellow eyes, the exfoliative eyes showed poorer visual acuity (p < 0.05) and more frequent occurrence of subcapsular cataract (2% vs 8%). Compared with the fellow eyes the lenses in the capsular glaucomatous eyes were more opaque, whether without pilocarpine (p < 0.05), or with pilocarpine treatment (p < 0.0001). Visual acuity was poorer (p < 0.01), refraction more myopic (p < 0.05), and anterior chamber depth less (p < 0.05) in the capsular glaucomatous eyes with pilocarpine treatment. Thus, there are slight changes in the lenses of the exfoliative eyes, the cataractous lens changes being more advanced in the capsular glaucomatous eyes.

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confidence: 99%

Lens opacity in unilateral exfoliation syndrome with or without glaucoma

Puska

1994

Acta Ophthalmologica

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“…Studies on cataract patients have shown that the reproducibility of this method is good for nuclear and mixed cataracts and poor for cortical and posterior subcapsular cataracts [6]. For merely clinical purposes a non-dilated 4 mm pupil is satisfactory.…”

Section: Discussionmentioning

confidence: 99%

Lens opacity in patients with hypercholesterolemia and ischaemic heart disease

et al. 1992

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Lens opacity studies were performed using an electronic Lens Opacity Meter (Interzeag Opacity Lensmeter 701) in a population (n = 321) with ischaemic heart disease. These patients are participating in a trial targetting at the reduction of mortality and incidence of myocardial infarction using a cholesterol-lowering drug, simvastatin. A separate study to evaluate the reliability of the method showed good reproducibility. Repeated measurements after a short time-interval (2-10 days) gave statistically lower opacity values either due to a change in lens transparency or perhaps a change in pigment and cell dispersion in the aqueous caused by repeated mydriasis. Lens opacity values showed a highly significant positive correlation to age. Serum cholesterol, systolic blood pressure and smoking habits showed no significant correlations to the levels of lens opacity when adjustments for age were made.

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“…Thus, in the follow-up of glaucomatous patients the appearance of lens opacities does not invali date the visual field interpretation. We have restricted the study only to cataracts affecting the central area of the lens because of the limi tations caused by the use of the LOM to quan tify lens opacities [6]. Obviously, further stud ies designed according to the type of cataract and performed with instruments able to quan tify each type of lens opacity are needed to ascertain whether other forms of cataract also validate the visual field interpretation.…”

Section: Discussionmentioning

confidence: 99%

“…We have studied the lens opacity meter (LOM), an instru ment based on the concept of the measure ment of stray light produced by the lens [4], In our previous investigations we have ver ified the ability of this instrument to quantify the light scattering that occurs both with lens aging in healthy subjects [5] and with the presence of lens opacities in cataractous pa tients [6].…”

Section: Introductionmentioning

confidence: 99%

Influence of Lens Opacities on Visual Field Indices

Costagliola¹,

Simone²,

Giacoia³

et al. 1990

Ophthalmologica

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This report presents the results of a study designed to verify the influence of lens opacities on the visual field indices. Four age-matched groups of subjects were considered: healthy volunteers, glaucomatous patients without lens opacities, cataractous patients without glaucoma and glaucomatous patients with lens opacities. The quantification of lens opacities was performed with the Lens Opacity Meter 701 instrument. The visual field indices were obtained automatically from the G1 program of the Octopus system. The statistical analysis of the results (coefficient of correlation) has shown that only the visual field indices that correspond to uniform and diffuse loss of light sensitivity were influenced by the presence of cataract. On the contrary, the visual field indices that indicate local irregularities of the threshold were not significantly influenced by the presence of lens opacities.

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Quantification and Measurement of Human Lens Opacities Using the Lens Opacity Meter

Cited by 13 publications

References 3 publications

Lens opacity in unilateral exfoliation syndrome with or without glaucoma

Lens opacity in unilateral exfoliation syndrome with or without glaucoma

Lens opacity in patients with hypercholesterolemia and ischaemic heart disease

Influence of Lens Opacities on Visual Field Indices

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