A US bobsled athlete has told of how happy he is to be able to see properly following a vision correction treatment in which contact lenses were implanted into his eye permanently.
Steve Holcomb has keratoconus, a degenerative disease that affects vision through distorting the shape of the cornea.
He had tried wearing glasses and contact lenses but still could not see properly and could not afford a higher prescription, the Associated Press reports.
Laser surgery had not worked either.
But US coach Brian Shimer discovered a new therapy which, at $15,000 (£10,450), was paid for by the US Olympic Committee.
Keratoconus causes the cornea to develop a conical shape, which causes refraction of the light as it enters the eye.
The early signs are blurring and sensitivity to bright light but the condition may worsen for up to 20 years before slowing or reaching a stable point.
Both eyes will not necessarily be affected in the same way, the National Keratoconus Foundation explains.
by Alexa Kaczka