| 摘要 |
PURPOSE: A book cover capable of automatically fitting the power of glasses is provided to enable a user to read a book without wearing the glasses by making the power of glasses change automatically. CONSTITUTION: A book cover capable of automatically fitting the power of glasses is a device for automatically adjusting the power of the glasses when a user reads a book. The book cover reduces inconvenience of wearing glasses when the user reads the book by making the power of the glasses change automatically. |
