Objective: To evaluate YAG capsulotomy rates following implantation of two types of trifocal intraocular lenses (IOLs). Methods: In this retrospective cohort study consecutive patients who underwent cataract surgery with a trifocal IOL from 1st May 2017 to 30th October 2019 at Aga Khan University Hospital, Karachi were included. Eyes which either had an AT Lisa Tri or Alcon PanOptix IOL implant were included. The primary outcome measure was Nd: YAG laser. Univariate analysis of all predictor variables was performed followed by a multivariate regression analysis of those which were significant. A p-value of < 0.05 was taken as significant. Results: A total of 328 eligible eyes were identified. Nine eyes were excluded. Out of the 319 eyes of 177 patients included in this study, 180 received AT Lisa Tri while 139 of them received Alcon PanOptix Trifocal IOLs. The mean (SD) age of the patients was 52.29 years (±11.04). Gender was equally distributed with 91 male patients (51.4%). Median (IQR) time to laser capsulotomy was 8 months (3-16). Clinically posterior capsular opacification (PCO) was present in 75 eyes (23.5%). A total of 39 eyes (12.2%) underwent Nd: YAG laser capsulotomy. Among the AT Lisa Tri group 29 eyes (16.1%) underwent laser capsulotomy compared to 10 (7.2%) (n=10) in Alcon PanOptix group (p=0.016). In both univariate and multivariate analyses, gender and IOL type were statistically significant. ---Continue

Background: Live lectures are commonly used in medical education, yet many students prefer video lectures instead. As different learning modalities may affect knowledge, it was necessary to explore medical students' perspectives about the two learning modalities in Pakistan. Objectives: This study aimed to explore and compare the medical students' perspectives regarding live lectures and video lectures. Methods: This cross-sectional study used an online questionnaire. This was distributed to medical students via internet platforms after institutional approval. Data were analyzed with SPSS version 23 using descriptive statistics. Results: 585 students, from 11 medical colleges across six cities of Pakistan, were enrolled. 64.4% (n=377) of the students were females, while 34.0% (n=199) were males. The first years comprised 32.7% (n=191), second years, 29.2% (n=171), and third years, 38.1% (n=223) of the total. The commonest reason for attending live lectures was 'they are compulsory'. The commonest reason for not attending was 'poor teaching quality'. 5.0% (n=29) of 585 students reported live lectures and 51.8% (n=290 of 560) found video lectures to be 'very helpful' in concept clarification. 85.1% (n=258) of 303 students found video lectures more effective for learning. For 45.4% (n=254) of students, video lectures improved their grades a lot; more students used video lectures for exam preparation over the years. 50.6% (n=296) of students wanted video lectures to be compulsory, compared with 28.5% (n=167) for live lectures. The main improvement in live lectures was not using slides. Conclusion: Medical students in Pakistan prefer video lectures over live lectures for learning and exam preparation. More students wanted video lectures to be compulsory in medical education. Several improvements have been suggested for live lectures.

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