Abstract
Background
Current guidelines vary regarding when to remove contact lenses prior to performing biometry, and there is no clear evidence behind these guidelines. This study aimed to determine the effect of soft contact lens wear on biometric measurements by examining the change in predicted lens power for emmetropia at several time points following removal of soft contact lenses.
Methods
A prospective, controlled study of healthy soft contact lens wearers. Biometry was performed immediately after removing contact lenses and then after 2, 4 and 7 days of no contact lens use. Healthy non-contact lens wearers were used as controls. All measurements were taken with the Zeiss IOLMaster.
Results
In all, 14 subjects and 13 controls were recruited. There was no significant difference in age or gender between groups. Eight of the fourteen subjects wore daily disposable CLs, two wore 2-weekly and four wore monthly soft CLs. Measurements from controls and contact lens-wearing subjects showed similar degrees of variation over time. The within-subject SD in predicted intraocular lens (IOL) power for emmetropia for contact lens wearers was 0.20 D (95% CI 0.16–0.25 D) compared to 0.18 D (95% CI 0.12–0.26 D) for controls.
Conclusions
There is a significant variation in UK practice regarding advice on the timing of cessation of contact lens wear prior to having biometry performed. Our study suggests that it is likely that soft contact lens wearers are currently being advised to remove their contact lenses for an unnecessarily long period of time prior to having biometry performed.
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References
Harstein J. Corneal warping due to wearing of corneal contact lenses; a report of 12 cases. Am J Ophthalmol. 1965;60:1103–4.
Wilson SE, Lin DT, Klyce SD, et al. Topographic changes in contact lens-induced corneal warpage. Ophthalmology. 1990;97:734–44.
Liu Z Pflugfelder. The effects of long-term contact lens wear on corneal thickness, curvature, and surface regularity. Ophthalmology. 2000;107:105–11.
The Royal College of Ophthalmologists. Cataract Surgery Guidelines, 2010.
The College of Optometrists. The Optical Workforce Survey. 2015. https://www.college-optometrists.org/the-college/research/research-projects/optical-workforce-survey2.html. Accessed 15 Feb 2016.
Dabasia PL, Edgar DF, Garway-Heath DF, Lawrenson JG. A survey of current and anticipated use of standard and spe- cialist equipment by UK optometrists. Ophthalmic Physiol Opt. 2014;34:592–613.
Goudie C, Pronin S, Court H, Pooley J, Tatham AJ. A national survey of the use of pachymeters by optometrists in Scotland: experience, views and barriers to use. Ophthalmic Physiol Opt. 2017;37:177–83. https://doi.org/10.1111/opo.12352
Key JE. Development of contact lenses and their worldwide use. Eye Contact Lens. 2007;33:343–5. discussion362-3
Tyagi G, Collins M, Read S, Davis B. Regional changes in corneal thickness and shape with soft contact lenses. Optom Vis Sci. 2010;87:567–75. https://doi.org/10.1097/OPX.0b013e3181e61b78
Ng LT, Lee EM, Nguyen AL. Preoperative assessment of corneal and refractive stability in soft contact lens wearing photorefractive candidates. Optom Vis Sci. 2007;84:401–9.
Hashemi H, Firoozabadi MR, Mehravaran S, Gorouhi F. Corneal stability after discontinued soft contact lens wear. Cont Lens Anterior Eye. 2008;31:122–5. https://doi.org/10.1016/j.clae.2008.02.001. Epub 2008 Mar 14.
EyeSys Vision. 2016. About EyeSys. http://eyesys.com/about.html. Accessed 21 July 2017.
Mehravaran S, Asgari S, Bigdeli S, Shahnazi A, Hashemi H. Keratometry with five different techniques: a study of device repeatability and inter-device agreement. Int Ophthalmol. 2014;34:869–75.
Sharifipour F, Panahi-bazaz M, Roghayeh Bidar R, Idani A, Cheraghianc B. Age-related variations in corneal biomechanical properties. J Curr Ophthalmol. 2016;28:117–22. https://doi.org/10.1016/j.joco.2016.05.004.
Faragher RGA, Mulholland B, Tuft SJ, Sandeman S, Khaw PT. Aging and the cornea. Br J Ophthalmol. 1997;81:814–7.
Moorfields Eye Hospital. Cataract Service Patient Information. Moorfields Eye Hospital NHS Foundation Trust, October 2014. Last viewed 5 Aug 2017. http://www.moorfields.nhs.uk/sites/default/files/Cataract.pdf
Moorfields Bedford Eye Unit. Cataract Information Leaflet. Moorfields Eye Hospital NHS Foundation Trust. Last viewed 5 Aug 2017. http://www.bedfordshireloc.org/Services/Bedford-Hospital/Cataract-information-leaflet.pdf
Gaston H. Patient information factsheet – Information for contact lens wearers having surgery. University Hospital Southampton NHS Foundation Trust, January 2011. Last viewed 5 Aug 2017. http://www.uhs.nhs.uk/Media/Controlleddocuments/Patientinformation/Eyes/Lensimplantsurgeryforcontactlenswearers-patientinformation.pdf
Berkshire Eye Service. Patient information – Cataracts and Cataract Surgery. [online] Royal Berkshire NHS Foundation Trust, revised December 2015. Last viewed 5 Aug 2017. http://www.royalberkshire.nhs.uk/patient-information-leaflets/Ophthalmology_cataracts-and-cataract-surgery.htm
East Kent University Hospital. Cataracts and their treatment. East Kent Hospital University NHS Foundation Trust, reviewed April 2017. Last viewed 5 Aug 2017 www.ekhuft.nhs.uk/EasySiteWeb/GatewayLink.aspx?alId=272788
East Sussex Healthcare NHS Trust. Understanding your cataract surgery. East Sussex Healthcare NHS Trust. Last viewed 5 Aug 2017 http://www.esht.nhs.uk/patient-and-visitor/visitors/leaflets/?entryid149=502568&char=U
London Eye Hospital. Biometry. London Eye Hospital, 2017. Last viewed 5 Aug 2017. http://www.londoneyehospital.com/diagnostics/biometry/
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Goudie, C., Tatham, A., Davies, R. et al. The effect of the timing of the cessation of contact lens use on the results of biometry. Eye 32, 1048–1054 (2018). https://doi.org/10.1038/s41433-018-0019-1
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DOI: https://doi.org/10.1038/s41433-018-0019-1
