Would be nice if they had holes to see through so you could use them with the eye masks that have holes to see [SEP] This would be a better product if they made some WITH holes and some without holes.<br />As they are, they interfere with the movement of your eyelashes and so are not entirely comfortable.<br />They have slits in them so they don't block out light completely, so I don't know what the purpose of the slits is.