What Is The Treatment For Angle Closure Glaucoma And Cataract?

Hi, My dad has been diagnosed with angle closure glaucoma and cataracts however he is only 44. I know that the type of glaucoma and eye problems that he has are rare but he also suffers with an excruciating intermissant pain in his right eye, that he usually gets in the early hours of the morning (waking him up) and in the day sometimes as well. Although, of more recent times, the pain has been happening more regularly in the day. The left eye also gets the same pain, but not as much as the right. I m writing this message because it has been going on for the last 15 years and he is still yet to be diagnosed properly. I wanted to see if anyone would have any further information or ideas on what this pain that he suffers with might be because nobody else seems to know.