Unasked & unanswered: over what range of myopia will these be effective? Minus 5, -7, -13? Can they handle astigmatism, either automatically or from an initial

Unasked & unanswered: over what range of myopia will these be effective? Minus 5, -7, -13? Can they handle astigmatism, either automatically or from an initial prescription? They need to send a high-myope reporter in to ask questions.