expression, na-adjective
non-prescription; plano; without optical correction
Used for glasses, contact lenses, or sunglasses that have no corrective power (0 diopters). Often appears as 度なしレンズ or 度なしメガネ.
このサングラスは度なしなので、誰でもかけられます。
These sunglasses are non-prescription, so anyone can wear them.
度なしのカラーコンタクトを買った。
I bought plano colored contact lenses.
度入り means 'with prescription' or 'corrective', the opposite of 度なし.
Compound of 度 (ど, 'degree' or 'diopter') + なし ('without'). Literally 'without degree'.