Context:Precise intraocular pressure (IOP) measurement is important in glaucoma practise. Various instruments are available today to accurately measure IOP. Thus, the question arises about which instrument to use and whether all of them can be used interchangeably.Aims:To assess the agreement between noncontact tonometer (NCT), rebound tonometer (RBT), Goldmann applanation tonometer (GAT), and dynamic contour tonometer (DCT) in measuring IOP.Subjects and Methods:499 eyes of 250 patients were evaluated during a period of 24 months from September 2010 to August 2012 and measurement of IOP by NCT, RBT, GAT, and DCT was done in the given sequence. The agreement was assessed by use of the Bland–Altman plot keeping GAT as a gold standard technique.Results:The mean IOP value of NCT, RBT, GAT, and DCT was 15.9 ± 5.5, 15.9 ± 5.8, 15.9 ± 4.9, and 16.0 ± 4.7 mm of Hg, respectively. The limits of agreement of GAT with DCT, NCT, and RBT were found to be +5.4 to −5.2, −4.7 to +4.6, and −5.2 to +5.1 mm of Hg, respectively.Conclusions:A positive and strong correlation was found between newer tonometers and GAT, but the limit of agreement was clinically unacceptable. The use of a single tonometer should be practised at a glaucoma clinic for a patient at each follow-up.
: The aim of this study was to analyze the surgically induced astigmatism in comparison to site of incision superior and temporal in commonly performed SICS technique of cataract surgery. : A prospective interventional study was done on 30 patients who underwent manual small incision cataract surgery (MSICS) divided into two groups namely sics superior group and sics tempral group based on incision-site. The two techniques were compared with respect uncorrected visual acuity, surgically induced astigmatism and type of astigmatism drift. In our study, There was significant difference between techniques regarding best uncorrected visual acuity on 40 post operative day. Greater proportion of patients had good outcomes in both the groups as regards to final visual acuity. Superior incision induced post operative ATR drift (75%) and temporal incision induced WTR astigmatism (70%). : Incision on steep axis is an economical and effective way of reducing pre-existing astigmatism in high-volume and low-cost cataract surgery.
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