title: Prevention of myopia by partial correction of hyperopia: a twins study.
abstract: OBJECTIVE
  To confirm the prediction of emmetropization feedback theory that myopia can be prevented by correcting the hyperopia of a child at risk of becoming myopic.
  
  
  METHODS
  We conducted such myopia prevention treatment with twins at risk. Their hyperopia was partially corrected by one half at age 7 and in subsequent years until age 16.
  
  
  RESULTS
  Hyperopia progressively decreased in all eyes as expected. None of the twins developed myopia. The spherical equivalent refractions of the followed eyes were +1 and +1.25 D at age 16. Feedback theory accurately predicted these values.
  
  
  CONCLUSIONS
  The treatment of the twins with partial correction of their hyperopia was successful. Prevention of myopia with this technique is relatively simple and powerful. The use of this myopia prevention treatment has no adverse effects. This prevention treatment is indicated in children with a hyperopic reserve at risk of developing myopia.
authors.affiliation: Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA. puerta@alum.mit.edu.|Multivision Research, 450 S Abel St. Unit 361361, Milpitas, CA, 90536, USA. puerta@alum.mit.edu.
authors.forename: Antonio
authors.initials: A
authors.lastname: Medina
mesh_terms: D001285:Atropine / Q000627:therapeutic use*; D002648:Child; D005260:Female; D006801:Humans; D006956:Hyperopia / Q000188:drug therapy* / Q000503:physiopathology; D020731:Keratomileusis, Laser In Situ / Q000379:methods*; D008297:Male; D009184:Mydriatics / Q000627:therapeutic use*; D009216:Myopia / Q000517:prevention & control*; D012029:Refraction, Ocular / Q000502:physiology; D014427:Twins
chemical_list: D009184:Mydriatics; D001285:Atropine
keywords: Emmetropia; Emmetropization; Feedback; Hyperopia; Myopia; Myopia prevention