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Before astigmatism reducing surgery, accurate corneal horizontal marking before surgery is important. Due to new corneal topographic method, iTrace™ surgical workstation, precise evaluation of corneal horizontal marking is available. In this study the investigators compared three known corneal horizontal making techniques and evaluate accuracy of each methods using iTrace™.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Group 1 | Group 1 : Bare eye marking group | ||
| Group 2 | Group 2 : Pendulum attached marker group | ||
| Group 3 | Group 3 : Horizontal slit beam assisted marker group |
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| Measure | Description | Time Frame |
|---|---|---|
| The vertical height deviation and rotational axis misalignment amount of each three marking techniques, evaluated by iTrace surgical workstation. | Nasal and temporal marked spots saved in iTrace surgical workstation program. | Within 10 minutes after corneal horizontal marking. |
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Inclusion Criteria:
Exclusion Criteria:
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Who visited professor Tae Im Kim's clinic, department of ophthalmology, Severance hospital.
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| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Institute of Vision Research, Department of Ophthalmology, Yonsei University College of Medicine | Seoul | 102-752 | South Korea |
| PubMed Identifier | Type | Citation | Retractions |
|---|---|---|---|
| 7425052 | Background | Hoffer KJ. Biometry of 7,500 cataractous eyes. Am J Ophthalmol. 1980 Sep;90(3):360-8. doi: 10.1016/s0002-9394(14)74917-7. No abstract available. | |
| 20954592 | Background | Cha D, Kang SY, Kim SH, Song JS, Kim HM. New axis-marking method for a toric intraocular lens: mapping method. J Refract Surg. 2011 May;27(5):375-9. doi: 10.3928/1081597X-20101005-01. Epub 2010 Oct 15. |
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