ABSTRACT
Autologous serum eye drops provide lubrication and promote epithelial healing. They have been successfully used in the management of ocular surface disorders such as dry eye disease, persistent epithelial defects and neurotrophic keratopathy for many decades. A great deal of variation in the methods of preparation of autologous serum eye drops, the end concentration and the duration of use exists in published literature. In this review, simplified recommendations for preparation, transport, storage and use of autologous serum are described. Evidence for the use of this modality in aqueous deficient dry eye disease is summarized, along with expertise-based rationale.
ABSTRACT
The shortage of donor corneal tissue worldwide has led to extensive research for alternate corneal equivalents utilizing tissue engineering methods. We conducted experiments using Poly D, L lactic acid polymer along with a copolymer (Eudragit) in varying concentrations to create a biodegradable scaffold suitable for in vitro growth of corneal epithelial stem cells. It was found that stable, spherical, and porous microparticles can be prepared by combining PDLLA and Eudragit RL100 polymers in the ratio of 90:10 and 70:30. The microparticles can then be fused to form scaffold membranes with porous architecture and good water retention capacity at room temperature using methanol, which can withstand handling during transplantation procedures. The scaffolds made using a 70:30 ratio were found to be suitable for the promotion of growth of laboratory corneal epithelial stem cell lines (SIRC cell lines). This innovation can pave way for further developments in corneal stem cell research and growth, thus providing for viable laboratory-derived corneal substitutes.
ABSTRACT
AIM: To evaluate the applicability and efficacy of superficial keratectomy with transplantation of preserved amniotic membrane in superficial corneal degenerations in a rural population of Northern India in terms of visual improvement and surface regularization. SETTINGS: Peripheral referral center in rural north India. MATERIALS AND METHODS: This was a prospective non-comparative interventional case series where 24 eyes of 20 farmers from peripheral rural areas (M:F = 19:1) with visually significant superficial degenerative disorders (15 eyes with climatic droplet keratopathy one of which was associated with Salzmann nodular degeneration and nine eyes with band-shaped keratopathy) were subjected to amniotic membrane transplantation (single or multiple layer) combined with superficial keratectomy. Subjective and objective outcomes after surgery were evaluated and analyzed and statistical significance of the outcomes in various disorders was evaluated. RESULTS: Eighty-eight per cent (21 eyes) had symptomatic relief from distressing preoperative symptoms while postoperative visual improvement by two or more lines was achieved in 23 eyes (96%) over a mean follow-up period of 26.8 +/- 10.2 months. The surface irregularity present preoperatively was relieved in 23 cases while postoperative decline of vision with visually significant scarring was seen in one case (4%), which was labeled as failure. CONCLUSIONS: Amniotic membrane transplant with superficial keratectomy helped achieve subjective comfort, visual rehabilitation and clinical regularization of the corneal surface in superficial corneal degenerations during the mean followup of 26.8 +/- 10.2 months in rural setups.
Subject(s)
Aged , Aged, 80 and over , Amnion/transplantation , Biological Dressings , Corneal Dystrophies, Hereditary/surgery , Female , Humans , India , Male , Middle Aged , Prospective Studies , Rural Population , Treatment Outcome , Visual Acuity/physiologyABSTRACT
Lattice corneal dystrophy is a distinct clinical entity characterised by amyloid deposits in the corneal stroma. We report a patient who presented with a corneal fistula in the right eye and thick lattice lines involving the peripheral cornea in both eyes suggestive of type III lattice dystrophy. The association of corneal fistula with lattice corneal dystrophy type III makes this a unique case.