Corneal topographic changes following retinal surgery.
BACKGROUND
To study the effect of retinal/ vitreoretinal surgeries on corneal elevations.


METHODS
Patients who underwent retinal/ vitreoretinal surgeries were divided into 3 groups. Scleral buckling was performed in 11 eyes (Group 1). In 8 (25%) eyes, vitreoretinal surgery was performed along with scleral buckling (Group 2). In 12 eyes, pars plana vitrectomy was performed for vitreous hemorrhage (Group 3). An encircling element was used in all the eyes. The parameters evaluated were best-corrected visual acuity (BCVA), change in axial length, and corneal topographic changes on Orbscan topography system II, preoperative and at 12 weeks following surgery.


RESULTS
There was a statistically significant increase in anterior corneal elevation in all the three groups after surgery (p = 0.003, p = 0.008 & p = 0.003 respectively). The increase in posterior corneal elevation was highly significant in all the three groups after surgery (p = 0.0000, p = 0.0001 & p = 0.0001 respectively). The increase in the posterior corneal elevation was more than the increase in the anterior elevation and was significant statistically in all the three groups (group I: p = 0.02; group II: p = 0.01; group III: p = 0.008).


CONCLUSIONS
Retinal/ vitreoretinal surgeries cause a significant increase in the corneal elevations and have a greater effect on the posterior corneal surface.
Rajendra Prasad Centre for Ophthalmic Sciences, All India Institute of Medical Sciences, New Delhi. sinharaj1@rediffmail.com
Rajesh
R
Sinha
Namrata
N
Sharma
Lalit
L
Verma
R M
RM
Pandey
Rasik B
RB
Vajpayee
D000293:Adolescent; D000328:Adult; D000368:Aged; D001251:Astigmatism / Q000175:diagnosis / Q000209:etiology*; D003316:Corneal Diseases / Q000175:diagnosis / Q000209:etiology*; D019781:Corneal Topography; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies; D012163:Retinal Detachment / Q000601:surgery; D012591:Scleral Buckling / Q000009:adverse effects*; D014792:Visual Acuity; D014821:Vitrectomy / Q000009:adverse effects*; D018630:Vitreoretinopathy, Proliferative / Q000601:surgery; D014823:Vitreous Hemorrhage / Q000601:surgery