Assessment of the mechanical forces applied during eye rubbing

BMC Ophthalmology
Farhad HafeziEmilio A Torres-Netto

Abstract

To determine the average amount of mechanical forces applied to the lids of keratoconus patients during eye rubbing. Fifty-seven patients (41 male, 16 female, average age 34.8 years) with a clinically and topographically diagnosed keratoconus and a history of eye rubbing were prospectively asked to perform their individual eye rubbing movement on a high-precision balance. The type of eye-rubbing movement and the force applied, represented in newtons (N), were recorded and analyzed. We detected three different types of eye rubbing. Rubbing with the fingertip was most frequent (51%), followed by rubbing with the knuckle (44%) and rubbing with the fingernail (6%). Each type of eye rubbing showed different average forces, with knuckle type eye rubbing applying significantly more force (9.6 ± 6.3 N) on the lids than fingertip (4.3 ± 3.1 N) and fingernail (2.6 ± 3.3 N) types (p < 0,001 and p = 0,016, respectively). There were major variations in the force exerted on the lids, depending on the type of eye rubbing employed. This data will help determine the forces that need to be applied in future experimental eye rubbing models.

References

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Jan 5, 2018·The British Journal of Ophthalmology·Emilio Almeida Torres NettoFarhad Hafezi
Jun 23, 2018·JAMA Ophthalmology·Jorge L AlioHany Soliman

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Citations

Jan 24, 2021·Graefe's Archive for Clinical and Experimental Ophthalmology = Albrecht Von Graefes Archiv Für Klinische Und Experimentelle Ophthalmologie·Srujana SahebjadaPaul N Baird

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Methods Mentioned

BETA
force measurements

Software Mentioned

SPSS Statistics
Excel

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