|Year : 1984 | Volume
| Issue : 6 | Page : 531-534
Role of circular cornea incisions in myopia
DJ Pandey, YP Singh, MM Agrawal, DN Pandey
S.N. Medical College, Agra, India
D J Pandey
S.N. Medical College, Agra
Source of Support: None, Conflict of Interest: None
|How to cite this article:|
Pandey D J, Singh Y P, Agrawal M M, Pandey D N. Role of circular cornea incisions in myopia. Indian J Ophthalmol 1984;32:531-4
|How to cite this URL:|
Pandey D J, Singh Y P, Agrawal M M, Pandey D N. Role of circular cornea incisions in myopia. Indian J Ophthalmol [serial online] 1984 [cited 2020 Aug 14];32:531-4. Available from: http://www.ijo.in/text.asp?1984/32/6/531/30862
Many surgical procedures have been tried to manage myopia, in an attempt to discard the glasses. The alteration of corneal power by operative procedures have been tried by many workers, with variable results.
The present study deals with long term evaluation of role of circular corneal incisions in correction or reduction of myopia.
| Material and method|| |
The present study includes 60 adult cases of myopia. All cases were excluded from any active local pathology, then they were subjected to the aseptic operation by Franceschetti's corneal trephine.
Cases were divided in three groups according to the operative procedures adopted
(1) Group A :-In this group of 20 cases, single circular incision in the peripheral part of cornea, about i mm inside the limbus and 0.60 mm in depth was made.
(2) Group B :-In this group of 20 cases, two concentric incisions, I mm apart were made in peripheral part of cornea.
(3) Group C:-In the third group of 20 cases, incisions were made as in group B, but the intervening corneal tissue was removed.
All the cases were reviewed upto a period of eight weeks at two weeks interval. When corneal curvatures were measured with keratometer and effect on myopia was evaluated. Later on patients were examined at 6 month and i year duration.
| OBSERVATIONS : SUMMARISED IN|| |
[Table - 1][Table - 2][Table - 3][Table - 4][Table - 5][Table - 6]
Mean change in horizontal curvature, after 8 weeks of operation was .157 mm, and 1.135 mm in Group A, B and C respectively [Table - 3].
Mean change in vertical curvatures was .170, 1.032 and 1.151 mm in Group A, B and C respectively [Table - 3].
Maximum change was observed in group C cases. Mean reduction in myopia was 1.175, 1.850 and 2.075 in Group A, B and C respectively, after 8 weeks of operation [Table - 4].
Maximum reduction was noted in Group C cases. 'p' values of these changes denote that these changes are significant. During follow up of these cases after 6 months and 1 year of operation as shown in [Table - 5][Table - 6], there was appreciable reduction in corneal curvature as well as in myopia in group `C' cases, but not much reduction in myopia was noted in group A and Group B cases.
| Discussion|| |
The operative procedure in present study is simple and safe. In all cases trephine incisions healed without complications and in most of the cases the eye became quiet within two weeks.
These surgical techniques have no adverse effect on the corneal sensation. Also the scar in single incision cases was hardly visible, whereas scar produced by double incision with or without intervening keratectomy was never more prominent than the Arcus Senilis.
The cases of Group A and Group B showed reversal of corrected values after one year's time.
This observation indicates that practically there is no appreciable role of single or double scarring in correction or reduction of myopia, in the long term. In Group `C' cases results were appreciable regarding reduction of myopia for long standing period.
[Table - 1], [Table - 2], [Table - 3], [Table - 4], [Table - 5], [Table - 6]