II. Indications

  1. Refractive Error Correction

III. Background: Refractive Surgery reshapes Cornea

  1. Myopia (Near-sightedness)
    1. Light rays focus in front of Cornea
    2. Surgery flattens Cornea to focus light further back
  2. Hyperopia (Far-sightedness)
    1. Light rays focus behind Cornea
    2. Surgery steepens Cornea to focus light closer
  3. Astigmatism
    1. Cornea is non-spherical with uneven surface
    2. Surgery evens out Cornea, directs light at Retina

IV. Techniques

  1. Laser In-Situ Keratomileusis (LASIK)
  2. Photorefractive Keratectomy (PRK)
    1. Replaced by LASIK
  3. Radial Keratotomy (RK)
    1. Replaced by LASIK
  4. Laser Thermal Keratoplasty (LTK)
    1. YAG laser mediated radial spot placement
    2. Heats Cornea and shrinks stromal collagen
    3. Modifies anterior Corneal curvature
    4. Corrects presbyopic patient with <4 D Refraction
  5. Intrastromal corneal ring (ICR or Intacs)
    1. Polymethylmethacrylate (PMMA) ring implanted
    2. Flattens central Cornea
    3. Corrects low Myopia (<3 D)
    4. Surgery easily adjustable
    5. No risk of central Corneal scarring
  6. Phakic Intraocular Lens
    1. Plastic intraocular lens
    2. Placed anterior to natural crystalline lens
    3. Corrects high Myopia and Hyperopia

Images: Related links to external sites (from Bing)

Related Studies (from Trip Database) Open in New Window

Ontology: Surgical ocular refractive procedure (C1274010)

Definition (MSH) Surgical procedures employed to correct REFRACTIVE ERRORS such as MYOPIA; HYPEROPIA; or ASTIGMATISM. These may involve altering the curvature of the CORNEA; removal or replacement of the CRYSTALLINE LENS; or modification of the SCLERA to change the axial length of the eye.
Concepts Therapeutic or Preventive Procedure (T061)
MSH D054140
SnomedCT 373391005
Spanish procedimiento de refracción ocular quirúrgica (procedimiento), Procedimientos Quirúrgicos Refractivos, procedimiento de refracción ocular quirúrgica, cirugía refractaria, cirugía refractiva (procedimiento), cirugía refractiva
English Surgical Procedures, Refractive, Procedures, Refractive Surgical, Refractive Surgical Procedure, Surgical Procedure, Refractive, Surgeries, Refractive, Refractive Surgeries, Refractive Surgical Procedures, Procedure, Refractive Surgical, Surgery, Refractive, Refractive Surgery, Surgical ocular refraction procedure, Refractive surgery (procedure), Refractive surgery, Surgical ocular refraction procedure (procedure), Surgical ocular refractive procedure
Portuguese Procedimentos Cirúrgicos Refrativos
Finnish Refraktiivinen silmäkirurgia
French Chirurgie réfractive, Interventions de chirurgie réfractive, Procédures de chirurgie réfractive, Procédures chirurgicales réfractives, Corrections chirurgicales de troubles réfractifs
German Refraktive Chirurgie, Refraktive chirurgische Verfahren
Italian Chirurgia refrattiva
Czech refrakční chirurgické postupy, refrakční chirurgie, refrakční chirurgické výkony
Croatian Not Translated[Refractive Surgical Procedures]
Swedish Refraktiv kirurgi
Polish Procedury chirurgii refrakcyjnej, Metody chirurgii refrakcyjnej, Zabiegi chirurgiczne refrakcyjne
Japanese 屈折矯正手術, 角膜屈折矯正手術
Norwegian Refraksjonskirurgi