A rule of astigmatism in pediatric subluxated crystalline lens

This study explored simplified rules of thumb to help determining the correct refraction. We postulated that the expected axis of astigmatism should be parallel to the direction of subluxation.
Source: Journal of AAPOS - Category: Opthalmology Authors: Source Type: research

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ConclusionNon-mechanical EXCIMER trephination seems to have advantages regarding postoperative corneal astigmatism and visual acuity compared with FEMTO trephination, especially in KC. A bigger sample size and longer follow-up are needed to evaluate the long-term impact of EXCIMER and FEMTO trephination on postoperative topographic and visual outcomes.
Source: Advances in Therapy - Category: Drugs & Pharmacology Source Type: research
Abstract OBJECTIVE: To evaluate the changes of visual acuity, contrast sensitivity, astigmatism, and higher order aberrations after blepharoplasty in patients with dermatochalasis. METHODS: Two hundred six eyelids of 103 patients with dermatochalasis were prospectively studied. Visual acuity, contrast sensitivity, corneal topography, astigmatism degree, and higher order aberrations were examined and recorded before and at 1 month after upper eyelid blepharoplasty. Change in contrast sensitivity and astigmatism values were determined according to margin reflex distance of patients, which were classified into t...
Source: European Journal of Ophthalmology - Category: Opthalmology Authors: Tags: Eur J Ophthalmol Source Type: research
Conclusions: DWEK induces an increased central posterior float localized to the site of Descemet membrane stripping, confirming the need for centralized stripping. Irregular astigmatism can occur after DWEK but is typically minimal and occurs more commonly in the setting of preoperative irregular astigmatism. DWEK induces about a 0.5 D hyperopic shift, which should be considered when determining intraocular lens power with simultaneous surgery.
Source: Cornea - Category: Opthalmology Tags: Clinical Science Source Type: research
CONCLUSION: Analysis of data detected a misdiagnosis of ectasia in 20 patients (26 eyes), a finding of 2.0% (20 of 1000) of referred cases that did not satisfy the diagnostic criteria of corneal ectasia. These conditions are considered a contraindication to corneal crosslinking and there is usually no benefit to topography-guided PRK or intrastromal corneal rings. It is important that clinicians recognize the clinical findings of these conditions and differentiate from true keratoconus, pellucid marginal degeneration, or ectasia after laser vision correction. PMID: 31109479 [PubMed - in process]
Source: Canadian Journal of Ophthalmology - Category: Opthalmology Authors: Tags: Can J Ophthalmol Source Type: research
CONCLUSIONS Alport syndrome patients without classical ophthalmological findings have smaller crystalline lens diameter and lower lens power. These signs may support the diagnosis of Alport syndrome. Ophthalmologists should not only seek for the known classic signs, but also the parameters of the crystalline lens, especially if genetic testing is not available. PMID: 30919828 [PubMed - in process]
Source: Medical Science Monitor - Category: Research Tags: Med Sci Monit Source Type: research
Conclusion: The pressure of upper eyelid in patients with ptosis appeared to have resulted in steepening of the superior cornea along this axis. The surgical correction of ptosis induces flattening of superior cornea as shown by significant decrease in apical keratometry front value postoperatively and restores corneal topography to a more regular state.
Source: Ophthalmic Plastic and Reconstructive Surgery - Category: Opthalmology Tags: Original Investigations Source Type: research
Rationale: The etiology of anterior corneal opacities and the effect of debridement cannot be determined by biomicroscopy. Optical coherence tomography (OCT) helps identify the character and depth of these lesions. Patient concerns: A 45-year-old female complained of progressive blurred vision for a long time. Slit lamp biomicroscopy showed irregular, faint scar-like opacity of anterior cornea in her both eyes. Pentacam Scheimpflug camera tomography showed irregular astigmatism of anterior corneal surface. Anterior segment spectral-domain OCT revealed thickened, hyper-reflective linings, and scattered lesions, mainly ...
Source: Medicine - Category: Internal Medicine Tags: Research Article: Clinical Case Report Source Type: research
CONCLUSION: Axial length and risk factors of amblyopia such as anisometropia, hyperopia, and strabismus were not associated with UCNLDO. UCNLDO is likely an isolated defect.
Source: Middle East African Journal of Ophthalmology - Category: Opthalmology Authors: Source Type: research
CONCLUSION: Superficial keratectomy is a simple, safe procedure that can be performed for a variety of conditions to improve visual acuity, reduce corneal astigmatism, and alleviate symptoms secondary to ocular surface pathology. PMID: 30502977 [PubMed - in process]
Source: Canadian Journal of Ophthalmology - Category: Opthalmology Authors: Tags: Can J Ophthalmol Source Type: research
Conclusion: Not all patients of intraoperative DM perforation (including macro perforation) needs to be converted to penetrating keratoplasty. DALK can be successfully done if the perforation is identified early and managed adequately. This is the only known study which has shown a large series of successful DALK even with macro perforations.
Source: Indian Journal of Ophthalmology - Category: Opthalmology Authors: Source Type: research
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