What does "purblind" mean?

Purblind: Nearsighted, or dim-sighted; seeing obscurely; as, a purblind eye; a purblind mole. The saints have not so sharp eyes to see down from heaven; they be purblindand sand-blind. Latimer. O purblind race of miserable men. Tennyson. -- Pur"blind`ly, adv. -- Pur"blind`ness, n.

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