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Aberrations Using Zernike Polynomials and Contact Lens

Whang WJ

Aberration refers to a phase difference in light caused by a variation in the refractive power. Zernike polynomials, the most widely used method for analyzing aberrations in the human eye,...
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Cerebral Basilar Artery Mycotic Aneurysm Associated With Aspergillus Endogenous Endophthalmitis

Lee MY, Whang WJ, Lee WK

  • KMID: 2337909
  • J Korean Ophthalmol Soc.
  • 2010 Dec;51(12):1671-1675.
PURPOSE: To report a case of mycotic aneurysm of the cerebral basilar artery associated with bilateral endogenous aspergillus endophthalmitis. CASE SUMMARY: A 41-year-old man with no underlying disease presented with decreased...
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Descemet Membrane Endothelial Keratoplasty to Treat Graft Failure after Descemet Stripping Endothelial Keratoplasty

Oh SE, Ha MJ, Whang WJ, Byun YS, Hwang HB, Na KS, Rho CR, Lee HS, Chung SH, Kim EC, Cho YK, Kim HS, Kim MS, Hwang HS

Purpose: We report a case of secondary Descemet membrane endothelial keratoplasty (DMEK) to treat graft failure after Descemet stripping endothelial keratoplasty (DSEK). Case summary: A 66-year-old female underwent DSEK of her...
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Peritalar Dislocations or Fracture-Dislocations

Rhee SK, Lee HS, Park JB, Chung JW, Um EY, Whang WJ

  • KMID: 2310243
  • J Korean Fract Soc.
  • 2001 Oct;14(4):689-697.
PURPOSE: To find the proper way and timing of treatment for minimizing the posttraumatic complication of peritalar dislocation or fracture-dislocation. MATERIALS AND METHODS: We reviewed total 12 cases of peritalar dislocation...
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Descemet Membrane Endothelial Keratoplasty after Penetrating Keratoplasty Graft Failure

Son WY, Ha MJ, Whang WJ, Byun YS, Hwang HB, Na KS, Rho CR, Lee HS, Chung SH, Kim EC, Cho YK, Kim HS, Hwang HS

Purpose: To report a case of a successful secondary Descemet membrane endothelial keratoplasty in failed penetrating keratoplasty. Case summary: A 46-year-old male with keratoconus in both of his eyes underwent...
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Preoperative Biometry and Effective Adding Power of the Multifocal Intraocular Lens

Lee J, Whang WJ

Purpose: To calculate the length of near focus or effective adding power on the corneal plane after implantation of a diffractive multifocal intraocular lens (IOL). Methods: The study was designed as...
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Descemet Stripping Automated Endothelial Keratoplasty for Repeated Penetrating Keratoplasty Graft Failure

Hwang GD, Yun HY, Ha MJ, Whang WJ, Chang DJ, Hwang HS, Na KS

Purpose: To report a case of Descemet stripping automated endothelial keratoplasty (DSAEK) for graft failure after re-penetrating keratoplasty (PK). Case summary: A 33-year-old man of Indian nationality who had developed right...
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Repeat Descemet Membrane Endothelial Keratoplasty after Descemet Membrane Endothelial Keratoplasty Graft Failure

Kim GH, Ha MJ, Chang DJ, Whang WJ, Byun YS, Hwang HB, Na KS, Rho CR, Lee HS, Chung SH, Kim EC, Cho YK, Kim HS, Kim MS, Hwang HS

Purpose: To report a case of secondary Descemet membrane endothelial keratoplasty (DMEK) for graft failure after primary DMEK. Case summary: A 47-year-old female underwent primary DMEK in her left eye with...
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Usefulness of Refractive Measurement by Wavefront Aberrometer in Children

Oh SE, Whang WJ, Park MR

Purpose: To compare the refractive measurements from a wavefront aberrometer, autorefractor, and retinoscopy after cycloplegia in evaluating the usefulness and validity of refractive measurements by a wavefront aberrometer in children. Methods:...
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Development of an Instrument for Slit-lamp Examination of Donor Corneas in Preservation Medium

Nam GH, Kim DR, Yoon YC, Yang SW, Whang WJ, Byun YS, Hwang HB, Na KS, Lee HS, Chung SH, Kim EC, Cho YK, Kim HS, Hwang HS

Purpose: To evaluate the effectiveness of an instrument devised for slit-lamp examination of donor corneas suspended in preservation medium. Methods: The study examined two donor corneas received at Yeouido St. Mary's...
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Comparison of Short Term Clinical Results Between Epi-LASIK and Femtosecond LASIK

Kim SI, Whang WJ, Byun YS, Song JH, Na KS, Joo CK

  • KMID: 2337894
  • J Korean Ophthalmol Soc.
  • 2010 Dec;51(12):1573-1578.
PURPOSE: To compare short-term clinical results of femtosecond LASIK with those of epi-LASIK. METHODS: Twenty subjects (40 eyes) underwent femtosecond LASIK and 20 subjects (40 eyes) underwent epi-LASIK for myopia with...
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Trends in Corneal Transplantation Revealed by KONOS and Health Insurance Review and Assessment Service Annual Reports

Lee J, Lee SY, Yoon YC, Park SK, Whang WJ, Byun YS, Hwang HB, Na KS, Lee HS, Chung SH, Kim EC, Cho YK, Kim HS, Hwang HS

Purpose: To analyze trends in corneal transplantation surgery and determine the number of domestic and imported corneal grafts used in South Korea. Method: The total number of keratoplasties and number of...
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Comparison of Accuracy of Six Modern Intraocular Lens Power Calculation Formulas

Yoon JH, Whang WJ

Purpose: To compare the accuracy of modern intraocular lens (IOL) power calculation formulas in predicting refractive outcomes after standard cataract surgery. Methods: The medical records of 203 eyes from 203 patients...
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Prediction of Effective Lens Position by Reference to the Preoperative Axial Length

Kim GH, Whang WJ, Kim HS

Purpose: We derived optimal formulae permitting effective lens position (ELP) for patients differing in terms of their preoperative axial lengths as revealed by partial coherence interferometry. Methods: We included 736 eyes...
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Steep Axis Incision Versus Temporal Incision in Microcoaxial Cataract Surgery

Whang WJ, Byun YS, Joo CK

PURPOSE: To determine if a difference exists in surgically-induced astigmatism (SIA) and the mean change in keratometric astigmatism in patients who underwent microcoaxial cataract surgery (MCCS). METHODS: A prospective study including...
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Corneal Asphericity Variations in Korean Myopic Children

Kim HS, Park SK, Whang WJ, Hwangm HS, Na KS

Purpose: Corneal asphericity (Q-value) represents the difference in curvature from center to periphery of the cornea. This study evaluated horizontal and vertical asymmetry in corneal asphericity in myopic children and...
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Astigmatic Analysis before and after Surgical Excision of Limbal Dermoid: Functional Outcome

Kim JH, Ahn YJ, Whang WJ, Park SH

PURPOSE: To analyze the length and area of limbal dermoid invading the cornea and to evaluate the effects on visual acuity and astigmatism before and after surgery. METHODS: This retrospective study...
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Novel Method Measuring Conjunctival Microvascular Blood Flow Velocity by Zoom-lens, Ultra-high-speed Camera Attached Slit-lamp Biomicroscope

Kim HS, Kim DR, Yoon YC, Yang SW, Yoo YS, Whang WJ, Byun YS, Hwang HB, Na KS, Lee HS, Chung SH, Kim EC, Cho YK, Kim HS, Hwang HS

Purpose: To introduce an intuitive method for measuring conjunctival microvascular blood flow velocity by imaging bulbar conjunctival microvessels using a slit-lamp biomicroscope equipped with a zoom lens and an ultra-high-speed...
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Accuracy of Intraocular Lens Power Calculation Formulas in Primary Angle Closure Glaucoma

Joo J, Whang WJ, Oh TH, Kang KD, Kim HS, Moon JI

PURPOSE: To compare the accuracy of intraocular lens (IOL) power calculation formulas in eyes with primary angle closure glaucoma (ACG). METHODS: This retrospective study compared the refractive outcomes of 63 eyes...
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The Effect of Preoperative Corneal Asphericity on the Refractive Outcomes of Multifocal Intraocular Lens Implantation

Beak JU, Shin HJ, Park CH, Whang WJ, Na KS, Kim HS

PURPOSE: To analyze the effects of preoperative corneal asphericity on the refractive outcomes of multifocal intraocular lens implantation by correlating Q-values on anterior corneal surfaces and the prediction errors after...
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