Biodegradable Acid-Based Fe2MnO4 Nanoparticles for Water Remediation.

This study demonstrated the synthesis of Fe2MnO4 modified by citric acid, a biodegradable acid, using a simple co-precipitation method. Characterization was performed using qualitative analysis techniques such as Fourier-transformed infrared spectroscopy, scanning electron microscopy equipped with energy-dispersive X-ray spectroscopy, X-ray diffraction, selected-area electron diffraction, N2 adsorption-desorption, and zero-point charge. The prepared nanoparticles had a rough and porous surface, and contained oxygenous (-OH, -COOH, etc.) functional groups. The specific surface area and average pore size distribution were 83 m2/g and 5.17 nm, respectively. Net zero charge on the surface of the prepared nanoparticles was observed at pH 7.5. The prepared nanoparticles were used as an adsorbent to remove methylene blue dye from water under various conditions. Using small amounts of the adsorbent (2.0 g/L), even a high concentration of MB dye (60 mg/L) could be reduced by about ~58%. Exothermic, spontaneous, feasible, and monolayer adsorption was identified based on thermodynamics and isotherm analysis. Reusability testing verified the stability of the adsorbent and found that the reused adsorbent performed well for up to three thermal cycles. Comparative analysis revealed that the modified adsorbent outperformed previously reported adsorbents and unmodified Fe2MnO4 in terms of its partition coefficient and equilibrium adsorption capacity under different experimental conditions.

Donor demographics and factors affecting corneal utilisation in Eye Bank of North India.

INTRODUCTION: Nearly 6.8 million people in India have vision less than 6/60 in at least one eye due to corneal diseases; of these, about a million had bilateral involvement. PURPOSE: To identify the challenges faced; the trends in collection, storage and utilisation of corneal tissues in an eye bank in north India. MATERIALS AND METHODS: The past records of Eye Bank linked to a tertiary hospital in northern India were analysed from November'1999 to October'2015 with respect to number of eye donations per year, donor demographics and utilisation of corneal tissues. RESULTS: The number of donations during the first 6 years were 100, 279 in the next 5 years and 473 in the last 5 years. The mean donor age was 63.2 ± 19.5 years. The percentage of donors less than 30, 31-60 and more than 60 years was 10%, 28% and 62%. Forty-two percent donations were from the hospital. The average time between the death and enucleation was 4.74 ± 5.31 hours. The percentage of corneas used in the donor age groups less than 30, 31-60 and above 60 years was 61.9%, 61.6% and 53.8%, respectively. The usability rate of the corneas from home and hospital was 63.7% and 55.3%, respectively. CONCLUSIONS: The eye bank had a lukewarm response in the beginning, but gained momentum with time. The myths and beliefs prevalent in our society deter people from donating eyes freely. Each eye bank needs to individualise its problems and find solutions for adequate procurement and utilisation of tissue.

To study the impact of diabetic retinopathy on quality of life in Indian diabetic patients.

Purpose: To study the impact of diabetic retinopathy (DR) on the quality of life (QoL) of Indian patients with diabetes. Methods: This cross-sectional tertiary health care institution-based study involved 250 patients of DR. They were interviewed using four questionnaires, namely, the General Health Questionnaire (GHQ), Final Quality of Life Instrument for Indian Diabetic Patients (QoLID) questionnaire for diabetes and questionnaire modified for DR, retinopathy dependent quality of life (RetDQoL), and coping strategy checklist (CSCL). Results: The mean GHQ score was 1.12, indicating the absence of psychological morbidity. Mean QoLID score for financial worries and treatment satisfaction scores were 15 each for DR compared with 17 and 16, respectively, for diabetes mellitus (DM). The mean RetDQoL score was -27.94 (±2.14), showing the negative impact of DR on QoL. The mean CSCL score was 1.22 (±0.14), indicating infrequent use of coping strategies. Scores achieved by all four questionnaires correlated to each other. On subgroup analysis, proliferative DR (PDR) patients had a significantly higher GHQ score, lower treatment satisfaction, and more financial worries, with a poorer QoL than nonproliferative DR (NPDR). The severity of the disease had a negative impact on the QoL. The treatment satisfaction and psychological impact on the patients undergoing all types of eye treatments were comparable. Conclusion: DR has a significantly detrimental impact on the QoL, which increases with increasing severity of the disease.

Indications and graft survival analysis in optical penetrating keratoplasty in a tertiary care center in North India: a 5-year study.

PURPOSE: To study the indications and variables correlating with graft survival in optical penetrating keratoplasty in a tertiary care hospital in north India. PARTICIPANTS: All patients who underwent optical keratoplasty, except those undergoing lamellar grafts, tectonic grafts transplants and penetrating keratoplasty done for therapeutic purposes were included in the study. Patients with follow-up less than 2 years were excluded from the study. MATERIALS AND METHODS: Data were obtained by reviewing the records of 101 patients who underwent optical penetrating keratoplasty from 2008 to 2013 for various indications. RESULTS: Out of 101 patients who underwent optical penetrating keratoplasty, 71 were males and 30 were females. The mean age of the recipient was 48.53 years with range 1-82 years. The main indications were previous failed graft (29.7%), healed keratitis except HSV (15.8%), pseudophakic or aphakic bullous keratopathy (14.8%), corneal dystrophies/degenerations (12.9%), adherent leucoma (9.9%), post-HSV scars (8.9%), and others like anterior staphyloma, congenital corneal opacities, buphthalmos and keratoconus (7.9%). The graft survival rate was 67.33% at 1-year follow-up and 59.4% at 2-year follow-up. The mean survival time of the grafts was 22.42 months. The mean time for graft failure was 7.12 (±0.9) months. CONCLUSION: One- and 2-year survival of grafts at our center is lower as compared to western studies, probably due to higher percentage of poor prognosis indications for surgery and a relative scarcity of excellent-quality donor corneas.

A Case of Bilateral Corneal Perforation in a Patient with Severe Dry Eye.

Dry eye is a common problem affecting mainly the adult population. In severe cases, it can result in sterile corneal ulcer and perforation. We report a rare case of a 26-year-old male, a known patient of severe dry eye who presented with sterile corneal ulcer with corneal perforation in both the eyes. The patient was managed by applying cyanoacrylate glue and bandage contact lens in both eyes and topical antibiotic, topical cyclosporine and preservative free artificial tears at two hourly intervals. The patient was investigated for the systemic cause of severe dry eye but no cause could be ascertained. On follow up, the patient reported marked relief in photophobia. On examination, both eyes showed sealed perforation with well formed anterior chamber. In conclusion, one should examine a dry eye patient carefully and detect corneal ulcers and perforations in time so as to prevent its sequelae.

Intracorneal Amphotericin B Injection in a Case of Indolent Candidal Keratitis.

Ocular candidiasis is one of the opportunistic infection occurring in human body. Pathogenesis wise, Candida is very virulent and slow growing organism. We report a case of 76-year-old female with left eye candidal stromal abscess, not responding to topical and oral antifungal drugs. Patient was administered intrastromal amphotericin B injection in the affected eye. Four midstromal injections were given in the areas surrounding the corneal abscess. A total of approximately 0.05 mL of amphotericin B, 5 µg per 0.1 mL, was administered. Within next four weeks, the eye became completely quiet with healed epithelial defect and corneal scarring. Intracorneal injection of amphotericin B is a safe and effective treatment option for recurrent and recalcitrant fungal infections.

Five-Year Retrospective Review of Cases with Benign Essential Blepharospasm and Hemifacial Spasm Presenting in a Tertiary Eye Care Center in North India.

Retrospective analysis of epidemiological and clinical characteristics of patients diagnosed with benign essential blepharospasm and hemifacial spasm who reported to the oculoplasty clinic of a tertiary eye care center in north India between January 2010 and April 2015 was carried out. Dry eye, as well as all the local factors that can cause blepharospasm or hemifacial spasm, was ruled out. Systemic evaluation was done to rule out any neurological disorder. A detailed history was taken to rule out any associated psychiatric disorders as well as use of any medication which could be responsible for dystonic movements. In every patient of hemifacial spasm, magnetic resonance imaging (MRI) of the brain was done for any facial nerve compression or tumor involving posterior fossa. Botulinum type A injections were given after assessing their requirements on the basis of guidelines given by Jankovic et al.