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Middle East African Journal of Ophthalmology Middle East African Journal of Ophthalmology
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ORIGINAL ARTICLE
Year : 2016  |  Volume : 23  |  Issue : 2  |  Page : 183-186

A comparison of rebound to indentation tonometry in supine sedated children with glaucoma


1 King Khaled Eye Specialist Hospital, Riyadh; Department of Ophthalmology, College of Medicine, Qassim University, Qassim, Saudi Arabia
2 King Khaled Eye Specialist Hospital, Riyadh; Dhahran Eye Specialist Hospital, Dhahran, Saudi Arabia
3 King Khaled Eye Specialist Hospital, Riyadh, Saudi Arabia; Wilmer Eye Institute, Johns Hopkins School of Medicine, Baltimore, MD, USA
4 King Khaled Eye Specialist Hospital, Riyadh, Saudi Arabia; Eye Institute, Cleveland Clinic Abu Dhabi, Abu Dhabi, United Arab Emirates

Correspondence Address:
Arif O Khan
Eye Institute, Cleveland Clinic Abu Dhabi, Abu Dhabi, United Arab Emirates

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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/0974-9233.179707

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Purpose: To compare intraocular pressure (IOP) measurements by rebound tonometry (Icare PRO; Icare Finland Oy, Helsinki, Finland) to measurements by indentation tonometry (Pneumotonometer Model 30 classic and Tono-Pen XL; Reichert, Buffalo, NY, USA) in supine sedated children with glaucoma. Methods: Prospective comparative observational study of Saudi Arabian children with glaucoma undergoing chloral hydrate sedation for ophthalmic examination (February 2012 - February 2013). Nonglaucomatous eyes were included as controls. Eyes with corneal scars or prior corneal transplant or lamellar surgery were excluded. Results: Fifty-two eyes (26 OD, 26 OS) of 28 children were included. Thirty-six eyes had glaucoma (32 primary congenital glaucoma, two Sturge-Weber related, and two aphakia related). Sixteen eyes did not have glaucoma (six with pediatric cataract, five normal eyes, two strabismic eyes, two eyes with simple megalocornea, and one eye had peripheral corneal laceration repair. In the glaucoma group, the mean IOP was 17.55 ± 5.97 mmHg (range, 8-31.5 mmHg) with the Icare PRO and 20 ± 6.4 mmHg (range, 8-35.5 mmHg) with the Pneumotonometer from 20.47 ± 6.81 mmHg (range, 10-43 mmHg) with the Tono-Pen XL. The Icare PRO readings were significantly lower than each of the indentation tonometers. For the control group, there was no statistically significant difference in IOP measured by the Icare PRO and the indentation tonometers. Conclusions: In this population of supine sedated children with glaucoma, IOP measurements with the Icare PRO tend to be lower than readings from the Pneumotonometer and Tono-Pen XL.


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