Cling film as a barrier against CJD in corneal contact A‐scan ultrasonography

Rani, Asha; Dunne, Mark; Barnes, D. A.

doi:10.1046/j.1475-1313.2003.00082.x

Cited by 5 publications

(9 citation statements)

References 7 publications

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“…The effect of cling film covering upon bias and intersessional repeatability was examined as previously described (Bland and Altman, 1986;Rani et al, 2003).…”

Section: Discussionmentioning

confidence: 99%

“…This raises some very serious ethical and legal issues relating to the clinical use of cling film covering over Goldmann-type tonometer probes. Although the minimal potential risk of passing CJD prions across the cling film barrier may be acceptable for A-scan ultrasound measurements on small samples of subjects (Rani et al, 2003), it is unlikely that the risks would be acceptable for routine use by optometrists carrying out Goldmann-type tonometry on the general public. Besides this, the research described above suggests that the reliability of IOP readings taken with cling film covering is considerably less than that of disposable Tonosafe Ò probes, the barrier properties of which are not an issue.…”

Section: Discussionmentioning

confidence: 99%

“…We recently published a paper that provides support for the use of cling film as a disposable covering for corneal contact A‐scan ultrasonography to avoid the risk of spreading Creutzfeldt–Jakob disease (CJD) from one subject to another (Rani et al. , 2003).…”

Section: Introductionmentioning

confidence: 99%

“…We recently published a paper that provides support for the use of cling film as a disposable covering for corneal contact A-scan ultrasonography to avoid the risk of spreading Creutzfeldt-Jakob disease (CJD) from one subject to another (Rani et al, 2003). Our paper made reference to personal communication with a Professor of Polymer Science who advised us that cling film creates a barrier against very low molecular weight substances such as water and oxygen and is thus theoretically impermeable to the much larger proteins (prions) associated with CJD.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Cling film as a barrier against CJD in Goldmann‐type applanation tonometry

Davies

Bartlett

Dunne

2003

Ophthalmic Physiologic Optic

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“…The effect of cling film covering upon bias and intersessional repeatability was examined as previously described (Bland and Altman, 1986;Rani et al, 2003).…”

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Cling film as a barrier against CJD in Goldmann‐type applanation tonometry

Davies

Bartlett

Dunne

2003

Ophthalmic Physiologic Optic

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“…, 2004). The use of three different ophthalmic instruments is not only time consuming but, because A‐scan ultrasonography involves corneal contact, it can also be hazardous; corneal anaesthesia becomes necessary and there is a risk of transferring infection from one patient to another via the ultrasound probe (Rani et al. , 2003).…”

Section: Introductionmentioning

confidence: 99%

Non‐invasive phakometric measurement of corneal and crystalline lens alignment in human eyes

Dunne

Davies

Mallen

et al. 2005

Ophthalmic Physiologic Optic

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We describe a non-invasive phakometric method for determining corneal axis rotation relative to the visual axis (beta) together with crystalline lens axis tilt (alpha) and decentration (d) relative to the corneal axis. This does not require corneal contact A-scan ultrasonography for the measurement of intraocular surface separations. Theoretical inherent errors of the method, evaluated by ray tracing through schematic eyes incorporating the full range of human ocular component variations, were found to be larger than the measurement errors (beta < 0.67 degrees , alpha < 0.72 degrees and d < 0.08 mm) observed in nine human eyes with known ocular component dimensions. Intersubject variations (mean +/- S.D.: beta = 6.2 +/- 3.4 degrees temporal, alpha = 0.2 +/- 1.8 degrees temporal and d = 0.1 +/- 0.1 mm temporal) and repeatability (1.96 x S.D. of difference between repeat readings: beta +/- 2.0 degrees , alpha +/- 1.8 degrees and d +/- 0.2 mm) were studied by measuring the left eyes of 45 subjects (aged 18-42 years, 29 females and 16 males, 15 Caucasians, 29 Indian Asians, one African, refractive error range -7.25 to +1.25 D mean spherical equivalent) on two occasions.

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Repeatability, reproducibility, agreement, and safety of Tono-Pen tip cover for intraocular measurement using latex and polyethylene wrap

et al. 2020

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To evaluate repeatability, reproducibility, and agreement of intraocular pressure measurement with Tono-Pen using Ocufilm and polyethylene wrap tip cover in human eyes. Methods This is a cross-sectional, experimental study. A gas-sterilized, polyethylene wrap was used as an alternative for Tono-Pen tip cover. For the right eye, 4 measurements using polyethylene wrap tip cover were done by two examiners (A and B) in random order to assess intraobserver repeatability and inter-observer reproducibility. For the left eye, 4 measurements were done by examiner A using both polyethylene wrap tip cover and Ocufilm in random order to assess intra-observer repeatability and agreement. Bland-Altman plot and intraclass correlation coefficient (ICC) were used in all analyses. Cost minimization analysis was evaluated. Results For examiner A, the repeatability of polyethylene wrap tip cover was-0.34, 95% limits of agreement (LOA) were-3.04 to 2.36, and ICC was 0.93 in the right eyes. As for the left eyes, the repeatability of polyethylene wrap tip cover was-0.33, 95% LOA were-3.01 to 2.36, and ICC was 0.93. For examiner B, the repeatability of polyethylene wrap tip cover was-0.02, 95% LOA were-2.88 to 2.83, and ICC was 0.92. The inter-observer reproducibility of polyethylene wrap tip cover was 0.36, 95% LOA were-3.34 to 4.07, and ICC was 0.90. The repeatability of Ocufilm was-0.42, 95% LOA were-2.75 to 1.91, and ICC was 0.95. The agreement of polyethylene wrap tip cover and Ocufilm was-0.71, 95% LOA were-5.18 to 3.76, and ICC was 0.83. There were no allergic reactions or serious complications. From the

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Cling film as a barrier against CJD in corneal contact A‐scan ultrasonography

Abstract: The results support the use of cling film as a disposable covering for corneal contact A-scan ultrasonography to avoid the risk of spreading CJD from one subject to another.

Cited by 5 publications

References 7 publications

Cling film as a barrier against CJD in Goldmann‐type applanation tonometry

Cling film as a barrier against CJD in Goldmann‐type applanation tonometry

Non‐invasive phakometric measurement of corneal and crystalline lens alignment in human eyes

Repeatability, reproducibility, agreement, and safety of Tono-Pen tip cover for intraocular measurement using latex and polyethylene wrap

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