Mapping the thickness of retinal layers using Spectralis spectral domain optical coherence tomography in Indian eyes.

Purpose: This study aimed at establishing the normative data for the thickness of macular layers on Spectralis Spectral-domain optical coherence tomography (SD-OCT) in healthy Indian eyes and testing the effects of age, gender, central corneal thickness (CCT), and intraocular pressure (IOP) on such values. Methods: This cross-sectional study was done on 308 eyes of 159 healthy subjects. OCT scans were obtained using the posterior pole asymmetry scan protocol. From the thickness map, data were grouped into nine Early Treatment Diabetic Retinopathy Study (ETDRS) macular sectors. Correlation between retinal thickness and age/IOP/CCT was done using Pearson correlation. Correcting for age as a covariate, multivariate regression analysis was done to know which retinal layers showed significant differences in thickness between males and females. Results: The mean age was 46.06 ± 13.06 years (range: 20-75 years). Significant central subfield (CSF) thickening with age was noted in retinal nerve fiber layer (RNFL), inner nuclear layer (IPL), inner nuclear layer (INL), outer plexiform layer (OPL), and outer nuclear layer (ONL) (P < 0.04). The average thickness of the outer ring reduced with age in the ganglion cell layer (GCL)/IPL/INL (P = 0.001). Women had thinner inner and outer retinal thickness than men in all ETDRS rings (P < 0.001). There was no interocular asymmetry (P > 0.05) and no correlation between IOP/CCT and retinal layer thickness. Conclusion: In CSF, age-related thickening was noted in RNFL, IPL, INL, OPL, and ONL. The average inner ring thickness decreased with age in GCL and IPL and increased in the RPE layer. The average outer ring thickness decreased with age in GCL, IPL, and INL layers and increased in OPL. The average IR and OR thickness was significantly less in women compared to men in all sub-fields. There was no correlation between IOP/CCT and retinal layer thickness.

A survey of E-learning methods in nursing and medical education during COVID-19 pandemic in India.

BACKGROUND: COVID-19 pandemic has necessitated mandatory e-learning in medical and nursing education. How far are developing countries like India (with wide socioeconomic and cultural diversity) geared up for this challenge remains unexplored. At this critical juncture, we aim to evaluate if online teaching methods are as feasible, acceptable, and effective as in-class teaching for medical/nursing students. OBJECTIVES: The questionnaire captured: (1) practicability/feasibility of online classes, (2) health issues from online classes, (3) current methods for e-teaching, and (4) student attitudes and preferences. DESIGN: Cross-sectional survey. SETTINGS: Population-based study in India. PARTICIPANTS: Nursing and medical undergraduate students (I-IV year). METHODOLOGY: The online questionnaire was distributed to 200 medical and nursing colleges across India. Categorical variables were analyzed using chi-square tests. Binary logistic regression was done to analyze factors predicting health issues in students. p < 0.05 was considered significant. RESULTS: Overall, 1541 medical and 684 nursing students completed the survey from 156 cities. The availability of laptop (p < 0.0001), Wi-Fi (p < 0.0001), dedicated room (p < 0.0001), and computer proficiency was more in students of affluent families and those from cities (p < 0.0001). Class duration >4 h/day (p < 0.0001), each class >40 min (p < 0.009) and pre-existing health issues (p < 0.0001) predicted the occurrence headache, eyestrain, anxiety, neck/back pain, and sleep disturbance. Power-point presentation was the most widely (80%) used method of teaching. Only 30% got adequate time to interact with teachers. Only 20.4% felt e-learning can replace conventional teaching. Students preferred: 3-6 classes/day, each class <40 min, 10-20 min break between classes and interactive sessions. CONCLUSION: There is a need to improve information and communication infrastructure to enhance feasibility of e-learning for nursing/medical students in India. There should be guidelines (number of classes/day, length of each class, break between classes, curriculum, etc) to improve the retention capacity in students and reduce health issues. Continuous feedback from teachers and students will be required to make e-learning effective.

Digital Eye Strain Epidemic amid COVID-19 Pandemic - A Cross-sectional Survey.

Purpose: There has been an enormous increase in the use of gadgets for online classes and entertainment during the COVID-19 pandemic. This study aimed to estimate the prevalence of digital eye strain (DES), describe the pattern of gadget usage, and analyse the risk factors for DES.Methods: This online survey analysed 941 responses from students of online classes (688), teachers of online classes (45), and general population (208). A pre-validated questionnaire was used to calculate the DES score. Non-parametric tests of medians were used to compare the median DES score, Chi-square test to compare categorical variables, and binary logistic regression to find the predictors of DES.Results: The prevalence of eye strain was higher among students taking online classes compared to the general public (50.6% vs 33.2%; χ2 = 22.5, df = 1, p < .0001). There was an increase in screen time during the pandemic compared to pre-pandemic time. The DES score was highest among students attending online classes (p < .0001), in those with eye diseases (p = .001), greater screen time (p = <0.0001), screen distance <20 cm (p = .002), those who used gadgets in dark (p = .017) and those who took infrequent/no breaks (p = .018). The DES scores were proportional to the increase in the number of hours of gadget usage during the pandemic.Conclusion: There is a need to educate people about limiting overall screen exposure and ergonomic methods of screen viewing. Efforts from policymakers to reduce the duration of online classes for students and online work hours for professionals are warranted to control this epidemic of eye strain.

COVID-19 preparedness among public and healthcare providers in the initial days of nationwide lockdown in India: A rapid electronic survey.

BACKGROUND AND AIMS: The COVID-19 Pandemic has been raging across continents in recent months. Public health measures are crucial in preventing COVID-19. The Government of India declared a nationwide lockdown on 24 March, 2020. The objective of this study is to assess preparedness among general public and healthcare providers against COVID-19 by way of adopting public health measures at the very beginning of the nationwide lockdown in India. SETTINGS AND DESIGN: A rapid cross sectional electronic survey was conducted across the country between 25 and 27 March, 2020. METHODS AND MATERIALS: Participants were general public and healthcare providers. Online questionnaire was generated in Google Forms. This included precautionary measures such as staying home, hand hygiene, wearing masks, cough hygiene and advisory against face touching. The web link to the form was shared through WhatsApp. STATISTICAL ANALYSIS USED: Descriptive data analysis was done using Epi Info software (version-7). RESULTS: A total of 226 persons (general public = 183; healthcare providers [HCPs] = 43) participated in the study. During the lockdown, HCPs spent more time outside than the general public (p = 0.009). Only 47% of the participants claimed to practise frequent hand washing and majority (72%; n = 163) did not wear masks while outdoors. Almost a half (45%) of the participants touched their face frequently and very few (8%) participants covered their mouth or nose while coughing or sneezing. There was no significant difference between HCPs and general public in frequent hand washing (p = 0.456), wearing masks (p = 0.255), face touching (p = 0.632) or covering mouth/nose while coughing or sneezing (p = 0.428). CONCLUSION: There is lack of preparedness among general public and healthcare providers against COVID-19 at the beginning of the nationwide lockdown in India.