"It allows us to treat these patients here in Masterton, without having to make trips to Wellington."
It was often difficult to make those trips, he said. Travelling to Wellington could be difficult for older patients.
Patients with conditions such as macular degeneration, glaucoma and diabetes made up a big proportion of those expected to benefit from the new machine.
The OCT is an important diagnostic tool, allowing clinicians to make better decisions, Dr Maslin said. "It's huge, because you can make accurate clinical decisions. The machine gives me the picture of what's going on. Without this machine people can lose their sight because they are not being treated right."