Influence of Overnight Orthokeratology Lens Treatment Zone Decentration on Myopia Progression.
Conclusion: This self-control study without much interference factors shows that the decentration of OK lens can delay the development of myopia more effectively than being centric when uncorrected visual acuity was acceptable without obvious corneal complications, glare, or ghosting. PMID: 31827908 [PubMed]
ConclusionExcimer laser vision correction among ophthalmologists in Saudi is much higher than the market penetration in the general population reported in other countries. Most of the ophthalmologists who underwent the procedure were satisfied with the outcome.
AbstractTo evaluate the postoperative higher-order aberration (HOA) differences and visual quality outcomes of wavefront-optimised photorefractive keratectomy (PRK) surgery in 6.5-mm and 7.0-mm optic zones. The study included 136 eyes of 68 patients who underwent wavefront-optimised PRK surgery for myopia or myopia with astigmatism.Q values, third-order coma (Z [3, 1] andZ [3, − 1]), third-order trefoil (Z  andZ [3, − 3]), fourth-order spherical aberration (Z [4, 0]) and aberration coefficients were evaluated before surgery and 6 months after surgery. All patients underwent ophthalmic exa...
Authors: Qiu K, Zhang Y Abstract To assess eye axial length (AL), spherical equivalent (SE), astigmatic power, distance unaided visual acuity (UCVA), and their relationship in 7- and 8-year-old pupils in Kunming, Southwest China. Grade I and grade II pupils underwent measurement of AL, UCVA, and refraction. The associations of AL with SE, UCVA and astigmatic power were studied. 291 pupils enrolled with 50.2% girls. AL was 22.71 ± 0.61 mm in children with emmetropia (UCVA> 0.8, -0.50
Conditions: Myopia; Hyperopia; Astigmatism; Presbyopia Interventions: Device: Vision R-800 Phoropter; Device: Standard Phoropter Sponsor: Pete Kollbaum, OD, PhD Recruiting