The reason I commented is that the rest of your comment was excellent, and very informative. (I did not know our cornea and lens are UV opaque. And then the subsequent follow-ups to your point, explaining that it&#x27;s more subtle than that by nl and blincoln, were also very interesting.) Your knowledge of the subject and willingness to explain it indicates to me that you&#x27;re valuable to the HN community. So I felt it was worthwhile to point out the one bit of your comment which doesn&#x27;t work well on HN, since your account is new.