Efficacy of scleral imbrication on all quadrants in enucleated pig eyes

Purpose To evaluate the changes in axial length (AL) and corneal astigmatism induced by scleral imbrication on all quadrants in pig eyes. Study design Experimental study Methods We produced scleral imbrications either on all quadrants or on 2 consecutive quadrants of 5 enucleated pig eyes. Scleral imbrications 8 mm wide were made at 8 mm from the limbus on each quadrant. We determined the AL using an electronic caliper and the corneal astigmatism using a keratometer before and after the 2 types of scleral imbrications and compared the changes in ocular AL and corneal astigmatism induced by the 2 surgical procedures. Results The AL reduction after the scleral imbrication on all quadrants (3.96 +/- 0.56 mm) was larger than that on 2 quadrants (2.39 +/- 0.41 mm) (P = .001). The change in corneal astigmatism induced by imbrication on all quadrants (2.98 +/- 1.96 D) was less than that on 2 quadrants (5.95 +/- 2.04 D) (P < .029). Conclusions Scleral imbrication on all quadrants induced a shorter AL and less corneal astigmatism than did a standard scleral imbrication on 2 quadrants. Therefore, the former could be a more effective operation for retinal disorders associated with high myopia, including macular hole retinal detachment and myopic foveoschisis.