How beneficial are the bilberry extract and saffron extract, in reducing dry eye and promoting healthy intraocular pressure, respectively, or other possible benefits?

We would say these have been chosen to be included for a reason. But this will vary in terms of individual clients as to whether one or both will add something meaningful in their particular case. People have a wide array of abnormal circumstances with respect to vision and the physiologic health of the eye and its tissues. Not everyone has dry eye syndrome, nor an increased intraocular pressure. So, based on medical history people can choose to incorporate those ingredients in whichever way it makes the most sense to help their individual needs.