Well firstly well done on getting him to use something. If he's anything like mine it's a slippery slope to him
The ones that I would go to in the first instance are:
KORRES Ruscus and Chestnut Men's Eye Cream
This is really popular with the men in my family - it's light, absorbs easily and the Ruscus helps with dark circles while the chestnut helps with fine lines. Contains zinc oxide giving it SPF value of about 6. It's priced around £22.00 and is available from most major retailers.
Anthony Logistics Continuous Moisture Eye Cream
This contains green tea and caffeine for puffiness so may be the way to go if that is what he is really concerned about. Anthony is the biggest selling men's line in the US and this cream is readily available here for around the £32 mark.
And finally - one that I am using religiously myself - a fairly unknown brand called Beauty Lab. The eye cream in this range has helped me with dark circles and is putting up a good fight with my puffiness - which is no mean feat.
Beauty Lab Instant Renewal Eye Complex
This is perfectly unisex, is completely unscented and has a brilliant dispenser that you can control yourself - something missing in a lot of dispenser-led creams. Priced at £27.00 it's available from beautylabshop.com.
Let me know how you get on!