Hexagonal keratotomy.
Nordan
L T
LT
Maxwell
W A
WA
D001251:Astigmatism / Q000209:etiology; D006801:Humans; D007646:Keratotomy, Radial / Q000009:adverse effects / Q000379:methods*; D008027:Light; D012542:Scattering, Radiation; D014786:Vision Disorders / Q000209:etiology