PLEASANTON, Calif.—The Cooper Companies (NYSE:COO) reported an 11 percent year-over-year increase in revenue (9 percent pro forma) to $483.8 million for the fiscal second quarter ended April 30, 2016. CooperVision (CVI) revenue rose 9 percent to $391.2 million. CooperSurgical (CSI) revenue climbed to 23 percent to $92.6 million.

“This was a very solid quarter for us within both CooperVision and CooperSurgical,” remarked Robert S. Weiss, Cooper’s president and chief executive officer. “We remain optimistic about the back half of the fiscal year and that our strategies will continue to drive success in the coming years.”

Speaking on a conference call Thursday with financial analysts, Weiss noted that CooperVision’s second quarter revenue growth was driven by single use silicone hydrogel lens sales, which grew 52 percent, while two-week and monthly silicone hydrogel lenses grew a combined 14 percent both in constant currency.

Weiss also outlined to the analysts several strategic acquisitions Cooper has made over the past few months. At the beginning of April, the company added Genesis Genetics, a genetic testing lab company focused on pre-implantation genetic screening and diagnosis used during the IVF (In-Vitro Fertilization) process. At the beginning of May, Cooper added complementary IVF capital equipment products through the acquisition of K-Systems a small acquisition with roughly $7 million in revenue per year. In the last week of May, Cooper added the assets of Recombine, a genetic testing company specializing in carrier screening.

The Cooper Companies sustained a gross margin of 62 percent, the same as last year’s second quarter. On a non-GAAP basis, gross margin was 63 percent, in line with last year. Operating margin was 19 percent compared with 16 percent in last year’s second quarter. On a non-GAAP basis, operating margin was 24 percent versus 22 percent last year. The increase was the result of leveraging operating expenses, Cooper said.

Depreciation was $33.7 million, up 5 percent from last year’s second quarter. Amortization was $14.3 million, up 16 percent from last year’s second quarter due to acquisitions. Total debt increased to $64.1 million from Jan. 31, 2016, to $1,441.4 million, primarily due to higher cash balances and acquisitions, partially offset by operational cash flow generation.

Interest expense increased to $7.6 million compared with $4.7 million in last year’s second quarter primarily due to higher debt and interest rates, according to Cooper. Cash provided by operations was $97.8 million and capital expenditures of $41.1 million resulted in free cash flow of $56.7 million. Excluding integration costs of $9.0 million, adjusted free cash flow was $65.7 million.