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Question: Does a crooked or sliding frame affect the control results?
Myopia Control Glasses
Answer: Immensely. These functional lenses have a very strict "optical center" requirement. If the glasses slide down by even 5mm, the child is no longer looking through the clear zone but the treatment zone. This causes blurriness and misaligns the treatment signal, rendering the control ineffective. This is why frame adjustment is a key part of every follow-up.