The correct option is C as blind as a bat
A simile is a figure of speech that presents the likeness between two unlikely things and contains the words 'like' or 'as'. For example, as smooth as butter, light like a feather and so on. Here the sentence seeks a comparison between the speaker (who needs glasses to see) and something/someone whose blindness is prominent. Bats are rumoured to have no eyesight, hence 'as blind as a bat' is the appropriate simile here and option C is correct. Bees are known to sting badly, so they're famous as 'stung like a bee'. Common species of beetles do not contain hearing organs, hence they're used in the simile 'as deaf as a beetle'. Badgers contain a white spot on their heads, making them look bald, so they're used in the simile 'as bald as a badger'. Since these insects (and animals) do not fit in the context of the given sentence, options A, B and D are incorrect.