PURPOSE: To report the changes in corneal topography in 2 cases of ocular hypotony induced by cyclodialysis cleft after blunt trauma, which were successfully treated by argon laser photocoagulation. METHODS: For both patients, a full ophthalmic clinical examination and corneal topography were performed before and after argon laser cleft closure. RESULTS: In the first case, the corneal topography showed 3.81-D astigmatism at 96°, which was reduced to 1.1 D at 124° 1 week after treatment and 0.66 D at 122° at 3 weeks after treatment. In the second case, the corneal astigmatism was 3.91 D at 104°, which decreased to 1.44 D at 104° and 0.35 D at 118° at 1 week and 4 months after treatment, respectively. CONCLUSIONS: In both cases, the with-the-rule astigmatism reduced significantly after successful closure of the cleft and an increase in intraocular pressure.