Effect of pterygium on corneal topography and astigmatism
Chiang Mai Medical Journal (Formerly Chiang Mai Medical Bulletin) is an official journal of the Faculty of Medicine, Chiang Mai University. It accepts original papers on clinical and experimental research that are pertinent in the biomedical sciences. The Journal is published 4 issues/year (i.e., Ma...
Saved in:
| Main Authors: | , |
|---|---|
| Format: | บทความวารสาร |
| Language: | English |
| Published: |
Faculty of Medicine, Chiang Mai University
2019
|
| Online Access: | https://www.tci-thaijo.org/index.php/CMMJ-MedCMJ/article/view/92739/72622 http://cmuir.cmu.ac.th/jspui/handle/6653943832/65050 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Institution: | Chiang Mai University |
| Language: | English |
| id |
th-cmuir.6653943832-65050 |
|---|---|
| record_format |
dspace |
| spelling |
th-cmuir.6653943832-650502019-05-07T10:02:38Z Effect of pterygium on corneal topography and astigmatism ผลของต้อเนื้อต่อลักษณะพื้นผิวและภาวะสายตาเอียงของกระจกตา Sudarat Lornanthakul Napaporn Tananuvat Chiang Mai Medical Journal (Formerly Chiang Mai Medical Bulletin) is an official journal of the Faculty of Medicine, Chiang Mai University. It accepts original papers on clinical and experimental research that are pertinent in the biomedical sciences. The Journal is published 4 issues/year (i.e., Mar, Jun, Sep, and Dec). Abstract To study the effects of pterygium on corneal topography and astigmatism and to determine the critical pterygium size which induces signifi cant astigmatism. Methods Thirty-three patients with unilateral primary pterygium were evaluated for pterygium morphology (22 women and 11 men with mean age of 56.2±10.9 years). An automated keratometer and an Orbscan II were used to evaluate corneal astigmatism, and the latter was also used to assess corneal topography. Results from the pterygium and contralateral eyes were compared. Results Mean corneal extension and width of the pterygia was 2.7±1.0 and 4.2±1.2 mm, respectively. With-the-rule astigmatism was the most common type (66.7%), followed by oblique (27.3%), and against-the-rule astigmatism (6.0%). The median (IQR) corneal astigmatism between the pterygium and contralateral eyes as measured by auto-keratometry and Orbscan II including auto-K, sim-K, K at the 3-mm and K at 5-mm zones were signifi cantly different [1.00(0.50-1.94) and 0.75(0.38- 1.07) (p =0.011), 1.2 (0.65-2.30) and 0.70 (0.35-1.05) (p<0.001),1.5 (0.95-2.5) and 0.80(0.50-1.35) (p<0.001), 1.7 (0.75-2.93) and 0.90 (0.40-1.25) (p<0.001),respectively. Pterygium induced astigmatism of ≥1 D when it extended ≥2.25 mm onto the cornea (sensitivity 76.2%, specifi city 66.7%). Conclusion Corneal extension is an important parameter in assessment of pterygium-induced astigmatism. Surgical intervention is recommended when the pterygium extends 2.25 mm or more onto the cornea. 2019-05-07T10:02:38Z 2019-05-07T10:02:38Z 2017 บทความวารสาร 0125-5983 https://www.tci-thaijo.org/index.php/CMMJ-MedCMJ/article/view/92739/72622 http://cmuir.cmu.ac.th/jspui/handle/6653943832/65050 Eng Faculty of Medicine, Chiang Mai University |
| institution |
Chiang Mai University |
| building |
Chiang Mai University Library |
| country |
Thailand |
| collection |
CMU Intellectual Repository |
| language |
English |
| description |
Chiang Mai Medical Journal (Formerly Chiang Mai Medical Bulletin) is an official journal of the Faculty of Medicine, Chiang Mai University. It accepts original papers on clinical and experimental research that are pertinent in the biomedical sciences. The Journal is published 4 issues/year (i.e., Mar, Jun, Sep, and Dec). |
| format |
บทความวารสาร |
| author |
Sudarat Lornanthakul Napaporn Tananuvat |
| spellingShingle |
Sudarat Lornanthakul Napaporn Tananuvat Effect of pterygium on corneal topography and astigmatism |
| author_facet |
Sudarat Lornanthakul Napaporn Tananuvat |
| author_sort |
Sudarat Lornanthakul |
| title |
Effect of pterygium on corneal topography and
astigmatism |
| title_short |
Effect of pterygium on corneal topography and
astigmatism |
| title_full |
Effect of pterygium on corneal topography and
astigmatism |
| title_fullStr |
Effect of pterygium on corneal topography and
astigmatism |
| title_full_unstemmed |
Effect of pterygium on corneal topography and
astigmatism |
| title_sort |
effect of pterygium on corneal topography and
astigmatism |
| publisher |
Faculty of Medicine, Chiang Mai University |
| publishDate |
2019 |
| url |
https://www.tci-thaijo.org/index.php/CMMJ-MedCMJ/article/view/92739/72622 http://cmuir.cmu.ac.th/jspui/handle/6653943832/65050 |
| _version_ |
1681426196418527232 |