Thank you very much for your answer. So, it looks like his MRI result is normal. Thanks again it was very helpfull!!!
As far as the periventricular white matter changes that you are describing...these are most commonly reltated to "small vessel ischemic changes". I have commented on this pretty extensively in recent posts, and would ask you to look at some recent posts I have made about small vessel ichemic changes for a complete answer...but in a nutshell, these changes are very very common and nearly always (but not always) related to small vessel ischemic changes which is most commonly related to hypertension, diabetes, smoking, and just age.
As far as prominence of the opthalmic veins, it sounds based on their description that their is no specific reason that they identify as to the reason. The one pathologic reason that comes to mind why the superior ophthalmic vein may be enlarged is something called a "cavernous-carotid fistula", however this is very rare and in this setting usually the opthalmic vein is greather than 4 mm in diameter (very prominent) and often asymetric. So based on the description you provide, it's probably just the way he is built...