There could be other filters not listed. I sometimes wonder why on the Earth the observed sizes of the Sun and the Moon are the same, and recently wondered if t

There could be other filters not listed. I sometimes wonder why on the Earth the observed sizes of the Sun and the Moon are the same, and recently wondered if the effect is far better eyesight in some land animals, including humans, than would otherwise be the case. If the Moon looked larger than the Sun, the Sun would disappear more frequently and for a longer time in the daytime, and there'd be no corona; if vice versa, the eclipse would only ever be partial. Because the corona lasts 5 minutes only, once a lifetime, animals will stare at it in surprise. Only animals with eyes which won't be damaged by sustained bursts of daylight will pass on their genes. Perhaps it also gives rise to animals which can see both in the dark and in the bright light. Is such type of eyesight essential for higher intelligence? If so, it's part of the Great Filter, reducing the odds of intelligent life by orders of magnitude.