Note crossed eyes–one of the common side-effects of the inbreeding that produces white tigers. It’s not universal (Jazzy has two half-sibs at the sanctuary who are normal) but it does pop up. The two other issues seen frequently are cleft (or more accurately, deformed) palates which make it more difficult for the cats to eat large bone-in pieces of meat; and paw/foot deformities (which are the rarest).
Having crossed eyes does make it more difficult for the cats to see, but not impossible for them to be deadly. A different tiger with severely crossed eyes was noted as being able to snatch birds out of the air. (Wish I coulda seen him!)