Purpose: We examined the refractive changes in pseudophakic eyes of patients with idiopathic macular hole treated with silicone oil injection.
Methods: Twenty consecutive eyes of 19 patients with idiopathic macular hole who had undergone successful pars plana vitrectomy using silicone oil tamponade were studied retrospectively. Lensectomy with intraocular lens (IOL) implantation was performed on each patient before vitreous surgery. Five biconvex type IOL models were used. After pars plana vitrectomy and fluid-air exchange, silicone oil was injected to replace the air completely. Macular hole closure was confirmed by optical coherence tomography, and silicone oil removal was performed. Manifest refractions before silicone oil filling, with silicone oil filling, and after silicone oil removal were determined.
Results: A mean hyperopic shift +/- SD in spherical equivalents of +5.69 +/- 1.71 diopters (P < 0.0001) was observed with silicone oil instillation. In contrast, a mean myopic shift +/- SD of -5.63 +/- 1.33 diopters was observed after silicone oil removal (P < 0.0001). The absolute value of the refractive shift showed a strong correlation with the posterior radius of the IOL (r = 0.699, P < 0.0001).
Conclusion: IOL models with steeper posterior convex curvature result in larger refractive deviations in patients scheduled for silicone oil instillation.
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http://dx.doi.org/10.1097/00006982-200502000-00009 | DOI Listing |
BMC Ophthalmol
January 2025
Dept. of Retina and Vitreous, Narayana Nethralaya, #121/C, 1st R Block, Chord Road, Rajaji Nagar, Bengaluru, 560010, India.
Purpose: To report a rare case of a Coats-like response developing after vitreoretinal surgery for proliferative diabetic retinopathy (PDR) and its successful management with retinal laser photocoagulation and adjunctive intravitreal steroids.
Case Description: A 52-year-old woman with a five-year history of type 2 diabetes mellitus and hypertension presented with decreased vision in the left eye (counting fingers at 1 m). Examination revealed high-risk PDR in both eyes, with a subtotal macula-off combined retinal detachment in the left eye.
Langmuir
January 2025
Materials Science and Technology Division, CSIR - National Institute for Interdisciplinary Science and Technology, Thiruvananthapuram 695019, Kerala, India.
Meso/microporous nano silica modified with macromolecular polymers produces attractive hybrids that repel water and have a hydrophobic surface, making them highly effective for targeting and eliminating organic contaminants in aquatic environments. In this study, nano silica was functionalized with silicone oil, an oligomeric siloxane derivative, to produce a hydrophobic silica nano hybrid characterized by a non-wetting water contact angle of 139°. This hydrophobic hybrid nano silica showed a sustainable floating nature on water even in turbulent streams.
View Article and Find Full Text PDFCytometry A
January 2025
Materials Measurements Laboratory, National Institute of Standards and Technology, Gaithersburg, Maryland, USA.
An emulsion of silicone oil droplets in aqueous buffer produces a distinctive series of peaks or resonances in the side scatter histogram in a flow cytometer. As many as 12 peaks are observed in the violet-side scatter channel at 405 nm, with half that number observed in the blue side scatter channel at 488 nm. Using the index of refraction of the oil and buffer, the wavelength of light, and the collection angle and gain of the instrument, we assign the peaks to specific diameters at which Mie resonances occur.
View Article and Find Full Text PDFLangmuir
January 2025
Department of Chemical Engineering, Indian Institute of Technology Bombay, Mumbai 400076, Maharashtra, India.
Water-in-oil emulsions are critical in various fields, including food, agriculture, personal care, and pharmaceuticals. In some situations, spontaneous emulsification occurs in emulsions with high concentrations of oil-soluble surfactants, in which the parent water drops fragment into finer droplets, forming a network near the interface, which exhibits interfacial elasticity. This study investigates this phenomenon using a water/Span 80-paraffin oil system.
View Article and Find Full Text PDFMar Pollut Bull
January 2025
Department of Materials Science and Engineering, Dalian Maritime University, Dalian 116026, PR China; Dalian Key Laboratory of Internal Combustion Engine Tribology and Reliability Engineering, Dalian 116026, PR China. Electronic address:
As a global challenge, marine biofouling is causing serious economic losses and adverse ecological impacts. In recent years, a variety of promising and environmentally friendly anti-fouling strategies have emerged, among which the excellent anti-fouling performance of bionic autocrine coatings has been recognized. However, bionic autocrine coatings still suffer from uncontrollable secretion behavior, poor mechanical stability, and poor abrasion resistance.
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