We provide an overview of experimental studies on partially coherent spatial solitons in photorefractive materials, including the first experimental demonstration of bright and dark incoherent solitons, incoherent vortex solitons, Y-junction dark solitons and anti-dark solitons, and pixel-like incoherent soliton arrays. These solitons are created with partially spatially incoherent light beams ...

OBJECTIVE To assess the preoperative central corneal thickness (CCT) of myopic and/or astigmatism patients presenting for refractive surgery in a tertiary hospital in Yemen. METHODS In this hospital-based cross-sectional study, 2,304 subjects aged 18-50 years with myopia and myopic astigmatism who presented to the refractive surgery unit were recruited. Data for the current study was collecte...

Lithium niobate (LiNbO3, LN) devices play critical roles in quantum information processing. However, for special applications like key distribution (QKD), the characteristics of materials and their impact on practical systems must be intensively inquired. For first time, we reveal that photorefractive effect LN can utilized as a potential loophole to carry out malicious attacks by eavesdroppers...

Since the early 1980s, civil airmen have been allowed to correct refractive error (i.e., myopia, hyperopia, astigmatism) with corrective surgery. Prior Federal Aviation Administration research studies have shown that the number of civil airmen with refractive surgery continues to increase. A study that reviewed refractive surgery use in civil airmen for the years 1994-96, reported that the larg...

PURPOSE To describe a patient complaining of 'ghosting' and 'shadowing' after bilateral, sequential cataract extraction with toric intraocular lens (IOL) implantation who was found to have significant eyelid ptosis. METHODS The following is a case report. RESULTS The patient's complaints arose a few weeks after surgery. By the second postoperative month, the patient's keratometry had change...

PURPOSE OF REVIEW To report the recently published literature on ocular surface changes after refractive surgery, as well as the outcomes of treatment modalities on postrefractive surgery dry eye. RECENT FINDINGS Cyclosporine, the first US Food and Drug Administration approved agent to treat the underlying pathological mechanism of chronic dry eye, has demonstrated promising results in dry ey...

PURPOSE To report a specific line of research developed at the University of São Paulo/Brazil on fibrin glue used for sealing corneal perforations and the perspectives of use on non-perforated corneal ulcers and photorefractive keratectomy-operated corneas. METHODS To describe fibrin glue manufacture, development of a device to test the glued perforated corneal area resistance, subsequent exp...

Citation Jolly, Sundeep. " Direct fringe writing architecture for photorefractive polymer-based holographic displays: analysis and implementation. Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. The MIT Faculty has made this article openly available. Please share how this access be...

Focusing and defocusing of laser light has been observed for many years. Optical Kerr type materials exhibit this effect only for high intensities. We show experimental evidence that photorefractive materials can also produce dramatic focusing and defocusing. Whereas Kerr materials produce this effect for high intensities, photorefractive materials produce these effects independent of intensity...