Comparative Evaluation of Central Corneal Thickness in Cross-Linked Keratoconic Eyes
| Autor: | Mustafa Koc, Mustafa Ilker Toker, Kubra Ozdemir Yalcinsoy, Dilara Ozkoyuncu Kocabas, Pinar Kosekahya |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Adult
Male Keratoconus medicine.medical_specialty Corneal Pachymetry genetic structures Scheimpflug principle Subgroup analysis Comparative evaluation law.invention Cornea Young Adult 03 medical and health sciences 0302 clinical medicine law Ophthalmology medicine Humans Keratometer business.industry Healthy subjects Corneal Topography Ultrasound pachymetry medicine.disease eye diseases Cross-Sectional Studies 030221 ophthalmology & optometry Female sense organs business 030217 neurology & neurosurgery |
| Zdroj: | Cornea. 39:1080-1085 |
| ISSN: | 0277-3740 |
| Popis: | PURPOSE To compare the central corneal thickness (CCT) measurements measured by using the Pentacam Scheimpflug system with the CCT measured using ultrasound pachymetry (UP) and to compare the compatibility between the methods in normal, keratoconic, and cross-linked keratoconic corneas. METHODS The study included 50 eyes of 50 patients with keratoconus (keratoconus group), 50 eyes of 50 patients with progressive keratoconus who underwent corneal cross-linking treatment (CCL group), and 50 eyes of 50 healthy subjects (control group). Patients in the keratoconus and CCL groups were further classified into mild (mean keratometry [Km] ≤ 47 D) and moderate keratoconus subgroups (47.0 < Km < 52.0 D). CCT values were noted from the Pentacam Scheimpflug and UP. RESULTS The difference between the Pentacam and UP values was largest in the CCL group (-20.9 0.21.5 μm), followed by the keratoconus and control groups (-10.6 0.20.3 and 0.4 0.6.8 μm). The Pentacam and UP measurements were not comparable in the keratoconus and CCL groups (P = 0.001 and P < 0.001), whereas they were comparable in the control group (P = 0.62). In subgroup analysis, the 2 methods were comparable in the mild keratoconus subgroup (P = 0.12) and not comparable in the moderate keratoconus subgroup and in both mild and moderate subgroups of the CCL group (P = 0.001, P < 0.001 and P < 0.001). CONCLUSIONS Pentacam Scheimpflug tomography and UP can be used interchangeably in normal and mild keratoconic eyes, but not in moderate keratoconic and cross-linked keratoconic eyes. Pachymetry measurements from Scheimpflug must be interpreted with extreme caution with different methods before planning an invasive procedure in these eyes. |
| Databáze: | OpenAIRE |
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