Comparison of Different Topographic Reference Surfaces in Keratoconus Cases
OBJECTİVE: To compare the sensitivity and specificity of elevation maps obtained from different topographical reference surfaces used in the diagnosis of keratoconus. MATERİALS AND METHODS: In this study 40 eyes of 23 patients with keratoconus and 40 eyes of 25 refractive surgery candidates as a...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Sakarya University
2021-03-01
|
| Series: | Sakarya Tıp Dergisi |
| Subjects: | |
| Online Access: | https://dergipark.org.tr/tr/download/article-file/1134063 |
| _version_ | 1797350430568611840 |
|---|---|
| author | Ahmet Elbeyli Sucattin Kocamis Hasan Çakmak Emine Doğan |
| author_facet | Ahmet Elbeyli Sucattin Kocamis Hasan Çakmak Emine Doğan |
| author_sort | Ahmet Elbeyli |
| collection | DOAJ |
| description | OBJECTİVE: To compare the sensitivity and
specificity of elevation maps obtained from different topographical reference surfaces
used in the diagnosis of keratoconus.
MATERİALS
AND METHODS: In this study 40 eyes of 23 patients with keratoconus and 40 eyes of 25
refractive surgery candidates as a control group was measured with a
Scheimpflug camera (Sirius CSO-Italy). Using the receiver operator characteristic
curves (ROC), a comparison was made of the ability to differentiate keratoconus
from a normal cornea with anterior elevation(AE) and posterior elevation(PE)
measurements obtained from the spherical, aspherical, asphero-toric reference surfaces.
RESULTS: The ROC curve analysis showed
that posterior elevation measured from the aspherical and asphero-toric surfaces
had a significantly higher area under the ROC curves (0.987, 0.973
respectively) thanthevalueobtainedfromthesphericalreferencesurfaces. According to the data obtained from the ROC curve
analysis, the posterior elevation maps obtained from the aspherical and
asphero-toric reference surfaces had the highest sensitivity (97.5% for both)
and the posterior elevation map obtained from the aspherical reference surface
had the highest specificity (90%).
CONCLUSION: The highest sensitivity and
specificity values were obtained from the aspherical and asphero-toric
reference surfaces rather than from the spherical reference surface. When
compared to the anterior elevation values, the posterior elevation values were
found to be more sensitive and specific. Therefore, aspherical and asphero-toric
reference surfaces and a posterior elevation map would seem to be more accurate
in the differentiation of keratoconus and normal cornea. |
| first_indexed | 2024-03-08T12:44:45Z |
| format | Article |
| id | doaj.art-ce8fe70223e24794aafc7f041570e4d4 |
| institution | Directory Open Access Journal |
| issn | 2146-409X |
| language | English |
| last_indexed | 2024-03-08T12:44:45Z |
| publishDate | 2021-03-01 |
| publisher | Sakarya University |
| record_format | Article |
| series | Sakarya Tıp Dergisi |
| spelling | doaj.art-ce8fe70223e24794aafc7f041570e4d42024-01-21T07:40:10ZengSakarya UniversitySakarya Tıp Dergisi2146-409X2021-03-01111778410.31832/smj.74756028Comparison of Different Topographic Reference Surfaces in Keratoconus CasesAhmet Elbeyli0Sucattin Kocamis1Hasan Çakmak2Emine Doğan3MUSTAFA KEMAL ÜNİVERSİTESİSAKARYA YENİKENT DEVLET HASTANESİHITIT UNIVERSITYSAKARYA SAĞLIK BAKANLIĞI SAKARYA ÜNİVERSİTESİ EĞİTİM VE ARAŞTIRMA HASTANESİOBJECTİVE: To compare the sensitivity and specificity of elevation maps obtained from different topographical reference surfaces used in the diagnosis of keratoconus. MATERİALS AND METHODS: In this study 40 eyes of 23 patients with keratoconus and 40 eyes of 25 refractive surgery candidates as a control group was measured with a Scheimpflug camera (Sirius CSO-Italy). Using the receiver operator characteristic curves (ROC), a comparison was made of the ability to differentiate keratoconus from a normal cornea with anterior elevation(AE) and posterior elevation(PE) measurements obtained from the spherical, aspherical, asphero-toric reference surfaces. RESULTS: The ROC curve analysis showed that posterior elevation measured from the aspherical and asphero-toric surfaces had a significantly higher area under the ROC curves (0.987, 0.973 respectively) thanthevalueobtainedfromthesphericalreferencesurfaces. According to the data obtained from the ROC curve analysis, the posterior elevation maps obtained from the aspherical and asphero-toric reference surfaces had the highest sensitivity (97.5% for both) and the posterior elevation map obtained from the aspherical reference surface had the highest specificity (90%). CONCLUSION: The highest sensitivity and specificity values were obtained from the aspherical and asphero-toric reference surfaces rather than from the spherical reference surface. When compared to the anterior elevation values, the posterior elevation values were found to be more sensitive and specific. Therefore, aspherical and asphero-toric reference surfaces and a posterior elevation map would seem to be more accurate in the differentiation of keratoconus and normal cornea.https://dergipark.org.tr/tr/download/article-file/1134063keratokonuskorneakorneal topografireferans yüzey seçimischeimpflug kamerascheimpflug cameracorneacorneal topographykeratoconusreference body selection |
| spellingShingle | Ahmet Elbeyli Sucattin Kocamis Hasan Çakmak Emine Doğan Comparison of Different Topographic Reference Surfaces in Keratoconus Cases Sakarya Tıp Dergisi keratokonus kornea korneal topografi referans yüzey seçimi scheimpflug kamera scheimpflug camera cornea corneal topography keratoconus reference body selection |
| title | Comparison of Different Topographic Reference Surfaces in Keratoconus Cases |
| title_full | Comparison of Different Topographic Reference Surfaces in Keratoconus Cases |
| title_fullStr | Comparison of Different Topographic Reference Surfaces in Keratoconus Cases |
| title_full_unstemmed | Comparison of Different Topographic Reference Surfaces in Keratoconus Cases |
| title_short | Comparison of Different Topographic Reference Surfaces in Keratoconus Cases |
| title_sort | comparison of different topographic reference surfaces in keratoconus cases |
| topic | keratokonus kornea korneal topografi referans yüzey seçimi scheimpflug kamera scheimpflug camera cornea corneal topography keratoconus reference body selection |
| url | https://dergipark.org.tr/tr/download/article-file/1134063 |
| work_keys_str_mv | AT ahmetelbeyli comparisonofdifferenttopographicreferencesurfacesinkeratoconuscases AT sucattinkocamis comparisonofdifferenttopographicreferencesurfacesinkeratoconuscases AT hasancakmak comparisonofdifferenttopographicreferencesurfacesinkeratoconuscases AT eminedogan comparisonofdifferenttopographicreferencesurfacesinkeratoconuscases |