I have ESS Profile NVGs and ICE 2.4s and, as stated above, they both use the same inserts.
In a different style (sealed glasses), the Pyramex V2Gs also have Rx inserts available. They're lower profile than the ESS ICEs, a bit like skydiving glasses.
@Coach: G&G and JG have a 550; TM use to have one, too, but it got discontinued years ago.
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