Amy Pond's glasses

Amy Pond wore a pair of reading glasses, prescribed to her from Lens Opticians, (TV: The Power of Three) after she decided to resume travelling with the Eleventh Doctor. While Amy was relaxing with him in Central Park, the Doctor used her glasses to read, saying he could see better with them. Like the First Doctor's glasses, they actually improved his eyesight, (TV: The Angels Take Manhattan) rather than being used for mere cosmetic reasons, like both the Fifth Doctor's and the Tenth Doctor's glasses. (TV: Time Crash)

The Doctor kept the reading glasses after Amy was touched by a Weeping Angel, using them well into his travels with Clara Oswald. He wore them in his old age on Trenzalore when Clara came to be with him before he died, carving a toy.(TV: The Angels Take Manhattan, The Snowmen, The Rings of Akhaten, The Day of the Doctor, The Time of the Doctor)