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Measurements of anterior segment parameters using three different non-contact optical devices in keratoconus patients

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International Journal of Ophthalmology(English edition) 2013年第4期6卷 521-525页

作者： ahmet Taylan Yazici Gkhan Pekel Ercüment Bozkurt Yusuf Yildirim Evre Pekel ahmet demirok mer Faruk Yilmaz Beyoglu Eye Training and Research Hospital Department of Ophthalmology Pamukkale University

AIM:To evaluate the measurements of anterior segment parameters using three different non-contact optical devices in keratoconus patients.·METHODS:A hundred and one eyes of 55 keratoconus patients were enrolled in this *** mean age was26.2 ±8.9 *** inclusion criteria were keratoconus stage I to III according to the Amsler-Krumeich keratoconus *** the measurements were done by the same operator,under the mesopic light condition and repeated with three different optical methods;Visante,Orbscan and *** evaluated anterior segment parameters were anterior chamber depth(ACD),central and thinnest corneal thickness(CCT and TCT) and pupil diameter(PD).·RESULTS:The mean CCT measured by Visante,Orbscan and Pentacam were as follows:462.0 ±48.1μm,463.9±60.9μm,476.5±45.3μm,respectively(P =0.873).The mean ACD values were 3.34±0.33mm,3.26±0.33mm,3.49±0.40mm,respectively(P=0.118).The mean PD measurements were 5.11 ±1.14mm,4.80 ±0.85mm,3.80 ±1.38mm,respectively(P <0.001).The mean TCT measurements of Visante,Orbscan and Pentacam were 437.9 ±48.2μm,447.6±60.6μm and 459.9±44.0μm,respectively(P =0.214).The Visante and Orbscan measured CCT similarly,while Pentacam measured CCT thicker than the other *** Visante measured TCT thinner than the other two *** ACD measurements,Orbscan was the one giving the lowest *** was measured differently by the devices.·CONCLUSION:Although TCT,CCT and ACD measurements acquired by Visante,Orbscan and Pentacam in keratoconus patients are similar,PDmeasurements show large differences among the devices.

关键词： Visante Orbscan Pentacam corneal pachymetry anterior chamber depth pupil diameter

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Laser in situ keratomileusis in adult patients with anisometropic amblyopia

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International Journal of Ophthalmology(English edition) 2013年第3期6卷 362-369页

作者： Alper Agca Engin Bilge zgühan kkes Baz Ercüment Bozkurt Abdullah Ozkaya Dilek Yasa ahmet demirok Beyoglu Eye Research and Training Hospital Department of Ophthalmology Istanbul Medeniyet University

AIM: To evaluate the increase in corrected distance visual acuity (CDVA) after laser in situ keratomileusis (LASIK) in adults with anisometropic amblyopia. · METHODS: The medical records of consecutive patients diagnosed with anisometropic amblyopia at the time of refractive evaluation who underwent LASIK were retrospectively reviewed. Patients with at least a two-line difference of visual acuity (VA) between the eyes with a spherical refractive error difference of at least 3.00 diopters (D) or an astigmatic difference of at least 2.00D were included. Patients with any other possible reason for amblyopia other than anisometropia or those who had undergone previous amblyopia treatment were excluded. Amblyopic eyes with myopia or myopic astigmatism were considered as group 1, hypermetropia or hypermetropic astigmatism constituted group 2, and mixed astigmatism patients comprised group 3. Uncorrected distance visual acuity (UDVA), subjective manifest refraction, and CDVA were analyzed at 1 week and 1 month, 3, and 6 months. ·RESULTS: The study included 57 eyes of 57 patients. There were 33 eyes in group 1, 12 eyes in group 2, and 12 eyes in group 3. The preoperative mean values for spherical equivalent of subjective manifest refraction (SE) in groups 1, 2, and 3 were (-4.66±1.97)D, (4.40±1.00)D, and (0.15±1.05)D, respectively. Mean CDVA improved 0.1 log units (1 line LogMAR) at 6 months (P 0.05). Moreover, age, the amount ofpreoperative refractive error, and the levels of preoperative corrected and UDVA had no effect on postoperative CDVA improvement (P >0.05). · CONCLUSION: Correction of refractive errors with LASIK produced significant CDVA improvement in adult patients with anisometropic amblyopia and no previous ambl

关键词： amblyopia laser in situ keratomileusis refractive surgery visual acuity

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Photorefractive keratectomy in the correction of astigmatism using Schwind Amaris 750s laser

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International Journal of Ophthalmology(English edition) 2013年第3期6卷 356-361页

作者： Okkes Baz Necip Kara Ercument Bozkurt Engin Bilge Ozgurhan Alper Agca Kema Yuksel Yavuz Ozpinar ahmet demirok Department of Ophthalmology Beyoglu Eye Research and Education Hospital Department of Ophthalmology Kanuni Sultan Suleyman Education and Research Hospital

AIM: To evaluate the results of three photorefractive keratectomy (PRK) procedures in the treatment of astigmatism. · METHODS: In this retrospective comparative case series, 89 eyes of 50 patients who underwent PRK treatment for astigmatism were enrolled. The patients were divided into 3 groups based on the PRK procedure: Group 1: PRK without mitomycin -C (MMC) application, Group 2: PRK with MMC application, and Group 3: Trans-Photorefractive Keratectomy (T-PRK). The efficacy, safety, predictability, and complications of treatment were assessed at 1, 3 and 6 months after the treatment. ·RESULTS: At postoperative 6 months, the percentage of postoperative uncorrected visual acuity (UCVA) of 20/ 20 or better was 55.6% (20 eyes) in group 1, 75% (15 eyes) in group 2, and 75.8% (25 eyes) in group 3 (P = 0.144). The percentage of postoperative best corrected visual acuity (BCVA) of unchanged or gained ≥1 lines was 80.6% (29 eyes) in group 1, 70% (14 eyes) in group 2, and 90.9% (30 eyes) in group 3 (P =0.151). The percentage of postoperative BCVA of lost ≥2 lines was 11.1% (4 eyes) in group 1, 20% (4 eyes) in group 2, and 6.1% (2 eyes) in group 3. The mean manifest refractive spherical equivalent (MRSE) and mean cylindrical refraction were not significantly different among the each groups (P >0.05). At postoperative 6 months, the percentage of MRSE of within ±0.50 D was 100% (36 eyes) in Group 1, 100% (20 eyes) in Group 2, and 93.9% (31 eyes) in Group 3. At the each follow-up period, there was no significant difference in number of eyes with haze and mean haze score(P>0.05). ·CONCLUSION: The study showed that PRK without MMC, PRK with MMC and T-PRK appears to have similareffectiveness, safety and predictability in the treatment of astigmatism. The incidence of haze was also similar between the three groups.

关键词： photorefractive keratectomy mitomycin-C trans-photorefractive keratectomy astigmatism

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