I am sure the rifle would be just fine.
He is another option your Dad might like.. It sure worked for me and I have the same eye sight problems.
That is my Renegade with a Green Mountain Fast Twist 1-28 barrel (stainless) and a 1X T/C Hawkins scope on a T/C base mounted. The only thing about this rifle is ... HEAVY!!! It is not something you want to carry around all day long. But for in a stand it does perfect. I shoot 120 grains of Goex or Graf's black powder and a 300 grain .430 XTP out of a crushed rib sabot. Deadly rifle there.
Perhaps he would like to stick with the traditional aspect. So all you would need is the base from Fox Ridge Outfitters ($45.00) and a scope like the Nikon Pro Staff, and some Warne QD rings.. And a fast twist barrel from Green Mountain if you want him to shoot 200 yard shots....
Of course all of that would cost more them the Optima. So I am sure he will love the Optima since it comes from you... I know my Dad is that way.