From: The Bronte Sisters: The Brief Lives of Charlotte, Emily and Anne by Catherine Reef, p99.
In August, despite a throbbing toothache, Charlotte traveled with her father to the city of Manchester, where he was having surgery to restore his sight. The lenses of his. Eyes had developed cataracts. Removing a lens, if done correctly, would restore sight in that eye. Patrick Bronte was wide awake throughout the surgery and felt everything, because the doctor performed it without anaesthesia. In his copy of Modern Domestic Medicine, the reverence Bronte later noted, “The feeling, under the operation – which lasted 15 minutes, was of a burning nature, but not intolerable… My lens was extracted so the cataract can never return to that eye.”
The doctor removed just the left lens, because if an infection set in, he would only be permanently blinded in one eye. A month’s convalescence followed in a darkened room followed the surgery. During this time, a nurse applied leeches to the patient’s temples to reduce inflammation.”
The year was 1846. Having nothing better to do, Charlotte began writing: a little novel Called Jane Eyre.