far-sightedness

Bifocal lenses – in which a lens is split into two regions, usually for either near- or far-sightedness – require the wearer to direct their vision through the relevant region, depending on what they want to look at, in order to see clearly.

“Toddlers were meant to use their focusing power to get over their far-sightedness and then be toddlers … not read books or stare into screens,” Mutti said.

He believes that even if some of Carvalhaes' work could be viewed as "crude by current standards", there was also a "far-sightedness to it that you can see in the roots of today's sports science".

Snake wine is variously touted as a cure for rheumatism, arthritis, lumbago, leprosy, excessive sweating, hair loss, dry skin, far-sightedness, exhaustion, flu, fever, pain and migraines, and as a general all-round tonic.

“Just think of the far-sightedness of that man in 1930,” said Tushar.