- Corneal higher-order aberrations in eyes with chronic ocular graft-versus-host disease. [Journal Article]Ocul Surf 2019OS
- CONCLUSIONS: We succeed to assess the objective value in the optical function of the chronic ocular GVHD. Quantification of corneal HOAs could be an objective evaluation to assess optical function in eyes with chronic ocular GVHD.
- Current Trends in Modern Visual Intraocular Lens Enhancement Surgery in Stable Keratoconus: A Synopsis of Do's, Don'ts and Pitfalls. [Review]Ophthalmol Ther 2019; 8(Suppl 1):33-47OT
- Keratoconus is a relatively common ectatic, non-inflammatory corneal disorder that involves gradual visual deterioration through progressive alteration of the shape of the cornea. The corneal thinning, irregular astigmatism and higher order aberrations that occur as the disease progresses pose major challenges in the visual rehabilitation of such patients. This paper summarizes the current litera…
Keratoconus is a relatively common ectatic, non-inflammatory corneal disorder that involves gradual visual deterioration through progressive alteration of the shape of the cornea. The corneal thinning, irregular astigmatism and higher order aberrations that occur as the disease progresses pose major challenges in the visual rehabilitation of such patients. This paper summarizes the current literature regarding the results of visual enhancement procedures in patients with stable keratoconus treated with standalone anterior or posterior chamber phakic intraocular lens implantation and monofocal, toric or multifocal toric intraocular lens implantation following phacoemulsification for age-related cataract extraction or refractive lens exchange.
- Corneal Topographic Astigmatism Based on Total Corneal Power Data (CorT Total): A Benchmark for Total Corneal Astigmatism. [Journal Article]Cornea 2019C
- CONCLUSIONS: The CorT Total is a reliable benchmark measure that can be used to assess how well other measures of total corneal astigmatism correspond with the manifest refractive cylinder.
- Comparative Analysis of LASIK Flap Diameter and its Centration Using Two Different Femtosecond Lasers. [Journal Article]Med Hypothesis Discov Innov Ophthalmol 2019; 8(3):241-249MH
- The aim of this study was to compare the diameter, accuracy, variability, and centration with respect to the limbus of corneal flaps created by two femtosecond lasers, the VisuMax, and Wavelight FS200, for laser in situ keratomileusis (LASIK) and how these flaps affect visual outcomes. This is a retrospective chart review of flap morphology created during LASIK Surgery. Overall, 168 eyes underwen…
The aim of this study was to compare the diameter, accuracy, variability, and centration with respect to the limbus of corneal flaps created by two femtosecond lasers, the VisuMax, and Wavelight FS200, for laser in situ keratomileusis (LASIK) and how these flaps affect visual outcomes. This is a retrospective chart review of flap morphology created during LASIK Surgery. Overall, 168 eyes underwent flap creation using the WaveLight FS200 laser, and on 189 eyes, the VisuMax laser was used. Of these total number, flap morphology was analyzed in a random sample of 158 eyes; 80 with the Visumax laser and 78 with the WaveLight FS200 laser. Intraoperative photos of the flaps taken by the Wavelight Allegretto EX500 were analyzed. Flap diameters and centration were measured using Adobe Acrobat Pro. All patients had visual acuity measurements including uncorrected distance visual acuity (UDVA), corrected distance visual acuity (CDVA), spherical equivalent refraction (SE) and refractive astigmatism recorded three months postoperatively. Greater than 90% of patients in both groups achieved a UDVA of 20/20 postoperatively. The mean difference between targeted and achieved flap diameter was 0.50 +/- 0.15 mm in the VisuMax group and 0.35 +/- 0.15 millimeters (mm) in the FS200 group (P<0.01). The flap diameters of the VisuMax group were more precise with a variance of 0.024 mm compared to a variance of 0.038 mm in the FS200 group (P<0.05). VisuMax flaps were more nasally displaced (log(NA/TA) = -0.21 +/- 0.10 mm) compared to the FS200 flaps (log(NA/TA) = 0.03 +/- 0.10 mm), (P< 0.01). We concluded that both the VisuMax and FS200 created flaps larger than the preoperative targeted diameter. VisuMax created corneal flaps that had a greater degree of deviation from the targeted diameter when compared to flaps from the FS200. However, there was less variance in the VisuMax flap diameter. In addition, VisuMax flaps were more nasally displaced. There were no statistically significant differences in visual outcomes when comparing the two femtosecond lasers.
- Case Series: Slight Intraocular Lens Malpositioning as a Potential Cause of Vision Loss. [Journal Article]Optom Vis Sci 2019; 96(10):802-807OV
- CONCLUSIONS: The cases illustrate an insidious cause of decreased visual acuity after cataract surgery.Inconspicuous IOL malpositioning is one of the reasons responsible for decreased vision acuity after cataract surgery, which may not be easily identified by slit-lamp examination. High astigmatism and ocular higher-order aberrations derived from malpositioned IOL can be important clues.
- Correlations of Corneal Spherical Aberration with Astigmatism and Axial Length in Cataract Patients. [Journal Article]J Ophthalmol 2019; 2019:4101256JO
- CONCLUSIONS: Axial length has a negative effect on the anterior and total corneal SAs, which stabled around 0.33 μm and 0.30 μm in patients with axial length of ≥26 mm, respectively. Individualized SA adjustments are essential for patients undergoing aspheric toric IOL implantation with preoperative anterior corneal astigmatism of 1-2 D or ≥3 D. Toric IOLs with a negative SA of -0.20 μm are recommended for patients with anterior corneal astigmatism of 2-3 D if no customized therapy is warranted.
- Clinical Outcomes of an Asymmetric Model of Intrastromal Corneal Ring Segments for the Correction of Keratoconus. [Journal Article]Cornea 2019C
- CONCLUSIONS: The Keraring AS provides a new, apparently safe, and effective means of improving visual acuity and reducing the refractive error and mean keratometry in eyes with asymmetric keratoconus.
- Keratoconus Screening Among Myopic Children. [Journal Article]Clin Ophthalmol 2019; 13:1909-1912CO
- CONCLUSIONS: Children with high myopia irrespective of the degree of astigmatism may have corneal abnormalities which are more pronounced in cases with vernal keratoconjunctivitis. Corneal examination should be performed for highly myopic children to detect any corneal abnormality and to treat it as early as possible.
- Phacoemulsification in bilateral anterior lenticonus in Alport syndrome: A case report. [Case Reports]Medicine (Baltimore) 2019; 98(39):e17054M
- CONCLUSIONS: AS-OCT is a valuable device for confirming the budging of the anterior crystalline lens surface.
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- Diagnostic accuracy and agreement between visual acuity charts for detecting significant refractive errors in preschoolers. [Journal Article]Clin Exp Optom 2019CE
- CONCLUSIONS: The diagnostic accuracy of the visual acuity charts was high for the identification of significant refractive errors in preschool children. There was very good agreement between the visual acuity charts.