Précis: The iCare HOME2 tonometer generally can be considered reliable for most eyes and clinical settings, although it may produce slightly overestimated or underestimated intraocular pressure (IOP) readings in thicker and thinner corneas, respectively. Purpose: To evaluate the accuracy, correlation, and analysis of differences in IOP measurements between the gold standard Goldmann applanation tonometer (GAT) and the new, self-measurement iCare HOME2 tonometer (icare). Patients and Methods: In this retrospective study, patients were randomly selected from those who attended a routine examination in our clinic. After a complete ocular examination, each patient’s IOP was measured and recorded with GAT and iCare HOME2. Central corneal thickness was measured. Eyes with any corneal morbidity were excluded. Pearson correlation coefficient was used to determine the correlation between paired IOP measurements. Bland-Altman plots were graphed for the analysis of differences in IOP between the instruments. Results: One hundred thirty-five eyes of 70 patients were included in the study. The mean IOP measured with GAT was 16.3 ± 6.5 mm Hg (range: 3–56). The mean IOP measured with iCare HOME2 was 16.5 ± 7.3 mm Hg (range: 3–55), (P = 0.47). A strong, significant positive correlation was found for paired IOP measurements by the 2 instruments (r = 0.94; P < 0.0001). A small systematic proportional bias was seen for the paired IOP measurements, meaning that with higher IOPs the iCare HOME2 yielded higher IOP readings than GAT, but this difference was clinically insignificant. The instrument underestimated IOPs with corneas thinner than 522 µm, whereas it overestimated IOPs when corneas were thicker than this. Conclusion: The iCare HOME2 could be a reliable tonometer for most eyes and clinical settings. Central corneal thickness measurement is recommended in patients who use the instrument.
1 July 2013 in Ophthalmic Surgery, Lasers and Imaging Retina
BACKGROUND AND OBJECTIVE: To investigate the optimal technique for repairing recurrent rhegmatogenous retinal detachments. PATIENTS AND METHODS: A 2-year retrospective review of recurrent rhegmatogenous retinal detachments by 23-gauge pars plana vitrectomy (PPV) or combined 23-gauge PPV with encircling scleral buckling was performed. The primary outcome was anatomical success. The secondary outcome was the likelihood of achieving a final best corrected visual acuity of 6/12 or better at 6-month follow-up. RESULTS: Anatomical success was achieved in 65.2% (95% CI, 53.4% to 75.4%) of the PPV group versus 74.3% (95% CI, 57.9% to 85.8%) of the PPV–scleral buckling group with one additional procedure (not statistically significant). There was no significant difference in the likelihood of achieving a final acuity of at least 6/12 between groups at 6-month follow-up. CONCLUSION: The results of our study do not demonstrate a superiority of method of primary repair, or of one method of secondary repair, over another. [Ophthalmic Surg Lasers Imaging Retina. 2013;44:374–379.] From the Sydney Eye Hospital, Sydney Medical School, University of Sydney, 8 Macquarie Street, Sydney NSW 2000, Australia. The authors have no financial or proprietary interest in the materials presented herein. Address author correspondence to Ryan Rush, MD, 5407 Nova Scotia Court, Amarillo, TX 79119; 806-351-1870; fax: 806-351-1690; email: ryanbradfordrush21@hotmail.com. Received: May 16, 2012 Accepted: February 04, 2013 Posted Online: June 12, 2013