ABSTRACT
Purpose: The purpose of this study is to determine the ocular biometry characteristics and corneal astigmatisms using partial coherence laser interferometry in patients aged 40 years or above undergoing cataract surgery in a medical college in North-East India. Methods: In a hospital-based cross-sectional study, ocular biometry characteristics such as axial length (AL), anterior chamber depth (ACD), white-to-white (WTW) diameter, corneal power (K), and corneal astigmatisms (D) of consecutive eligible cataract patients in a medical college in North-East India between January 2015 and December 2017 were determined using the intraocular lens (IOL) master. Height and weight were also measured. Results: A cross-sectional study evaluated ocular biometry characteristics of 641 eyes in 641 eligible patients. The mean age was 64.04 ± 10.81 years. The mean AL, ACD, WTW, corneal power, IOL power, and body mass index (BMI) were 23.34 ± 1.12 mm, 3.12 ± 0.39 mm, 11.92 ± 0.54 mm, 44.41 ± 1.50 diopter (D), 20.53 ± 2.79 D, and 26.12 ± 4.32, respectively. Against-the-rule, with-the-rule, and oblique astigmatisms were 48.4%, 33.2%, and 18.4%, respectively. Corneal astigmatism of ?1 D was found in 292 eyes (45.55%) and >1.5 D in 182 eyes (28.39%). AL had statistically significant correlation with ACD, WTW, K, IOL power, height and weight but not with age. By multivariate analysis, AL was found to be associated with ACD, WTW, K and IOL power (P ? 0.05). The mean AL was negatively correlated with the mean K (R-square 0.138). Conclusion: This study is likely to provide the initial normative data for ocular biometry values in Indian adults 40 years or above, because such data is lacking in Indians using the IOL master. This will also help ophthalmologists in planning and improving the quality of surgical outcomes in phacoemulsification and phacorefractive surgeries by choosing the appropriate IOL and incision location.
ABSTRACT
AIM:To compare the clinical outcome of anterior chamber intraocular lens (IOL) at Ⅰ stage versus sclerafixed IOL at Ⅱ stage in complicated cataract surgeries with inadequate capsular support.METHODS:Complicated cataract surgeries with anterior chamber IOL (ACIOL) or scleral-fixated IOL implantation from January 2003 to December 2014 when capsular support was inadequate were included and analyzed.Postoperative best-corrected visual acuity (BCVA) were compared.Postoperative complications were recorded and analyzed.RESULTS:Totally 84 eyes and 79 eyes were included in the ACIOL group and in the scleral-fixated IOL group,respectively.The mean postoperative logarithm of minimal angle of resolution (LogMAR) BCVA at 1a was 0.30±0.64 and 0.33±0.34 in the ACIOL group and the scleral-fixated IOL group,respectively (t=0.407,P=0.712).The mean latest LogMAR BCVA was 0.67±0.55 and 0.62 ± 0.50 in the primary ACIOL group and the secondary scleral-fixated IOL group,respectively (t=0.225,P=0.545).There were more early postoperative complications in the ACIOL group (x2 =14.613.P＜0.001).No difference in late postoperative complications was found between the two groups (x2 =0.231,P=0.267).Regression analysis suggested that ACIOL and scleralfixated IOL implantation had similar latest postoperative LogMAR BCVA (t=0.397,P=0.957);however the existence of late complications were related with a worse final visual outcome (t=22.156,P＜0.001).CONCLUSION:The long-term differences in the visual outcomes and complication profiles after ACIOL at Ⅰ stage or scleral-fixated IOL implantation at Ⅱ stage in a complicated cataract operation are not found when capsular support is inadequate.
ABSTRACT
Aim: To evaluate the effects of Dexmedetomidine to reduce the intra ocular pressure and sedation in day care cataract surgeries. Materials and methods: This study was conducted in 50 patients of either sex, belonging to 40 – 60 years of age, ASA grade I and II admitted for cataract surgeries. Patients were randomized into two groups of 25 each. Group D received 1 mcg/mg of Dexmedetomidine as IM route, Group P received placebo as IM and intra ocular pressure changes, hemodynamic parameters, sedation levels and SPO2, anxiolysis and pain were monitored. Results: There was a statistically significant difference in group D before and after premedication in terms of intra ocular pressure reduction. This was not seen in placebo group. Systolic blood pressure, diastolic blood pressure and heart rate in the study was a statistically difference in group D before and after premedication. There was no statistically significant difference in group P before and after premedication. There was a statistically significant difference (P<0.05) between the group D and group P in terms of sedation. Oxygen saturation observed in group D and group P at intervals of 0, 10, 20, 30, 40, 50, 60 min showed no statistical significance (P>0.05). There was a statistically significant D. Srinivasa Naik, K. Ravi Kumar, Surendra Babu, R. Pandu Naik. Study of Dexmedetomidine as intramuscular premedication in outpatient cataract surgery: A placebo – controlled study. IAIM, 2016; 3(2): 60-68. Page 61 difference (P<0.05) between the group D and group P in terms of pain relief and anxiety after premedication. Conclusion: Results suggested that Dexmedetomidine produces sedation and a reduction of intraocular pressure with minimal hemodynamic side effects when given intramuscularly as premedication before cataract surgery under regional anesthesia.