Is there plastic surgery to increase interpupillary distance?

While there are operations to accomplish that change, they are not done for any cosmetic purpose as minor as aesthetically increasing the inter pupillary distance. This is a significant intracranial plastic surgery operation that is only done for a variety of major craniofacial syndromes.

There is an operation that accomplishes what you desire. However, it is very major and not something one would do for a minimal cosmetic defect. If your problem is more than minimal, seek a consultation with a Craniofacial Plastic Surgeon.