The present study compares keratometric reading and astigmatism
measured by verion image guided system with Pentacam and Galilei.
The difference between the preoperative and postoperative TCA was used to calculate the surgically induced corneal astigmatism
Keratometry is an objective method of estimating the corneal astigmatism
by measuring the curvature of central cornea.
was further categorized as low to moderate (cylinder error of [greater than or equal to] 0.50 D and < 3.00 D) and high ([greater than or equal to] 3.00 D) astigmatism
Conclusion: There is no significant difference between the SIA between two groups however there was a significantly less residual astigmatism
in VERION group (group 2).
Patients with astigmatism
of less than 1.25 D cylinder, irregular astigmatism
, central corneal opacity, patients with flesh pterygium and irregular astigmatism
, Fuchs endothelial dystrophy which might require corneal transplantation at a later stage, any form of keratoconus, pellucid marginal degeneration, chemical injuries were excluded from this study.
After the completion of Pentacam measurements, each patient was fitted with a suitable Lotrafilcon B (Air Optix Aqua, Air Optix Aqua for Astigmatism
, CIBA Vision, Duluth, USA) or Senofilcon A (Acuvue Oasys, Acuvue Oasys for Astigmatism
, Johnson&Johnson, Jacksonville, USA) SCL according to their manifest refraction.
As the director of AEI's Cornea and Refractive Surgery Service, Ang is a renowned Lasik surgeon who specializes in treating patients with nearsightedness, farsightedness, astigmatism
and presbyopia (difficulty reading at close distances).
ICLs have actually opened up new vistas in refractive surgeries and provide a safe and effective option not only for correcting myopia but also for astigmatism
, even in patients not eligible for LASIK.
The adaptive metalens simultaneously controls for three of the major contributors to blurry images: Focus, astigmatism
and image shift.
was diagnosed with an ophthalmological condition - high regular astigmatism
- which is an imperfection in the curvature of the cornea.
The author presents his method of astigmatism
analysis, the Alpins Method, which uses vector analysis to correct astigmatism
, detailing the method from preoperative planning to postoperative analysis.