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Letter to the Editor
Iatrogenic keratectasia after phototherapeutic keratectomy
  1. KAZUNORI MIYATA,
  2. TETSUYA TAKAHASHI
  1. Miyata Eye Hospital, 6-3, Kuraharacho, Miyakonojo-shi, Miyazaki, Japan
  2. Department of Ophthalmology, Omiya Red Cross Hospital, 8-3-33 Yono-shi, Saitama, Japan
  3. Department of Ophthalmology, University of Tokyo School of Medicine, 7-3-1, Hongo, Bunkyo-ku, Tokyo, Japan
  1. ATSUO TOMIDOKORO
  1. Miyata Eye Hospital, 6-3, Kuraharacho, Miyakonojo-shi, Miyazaki, Japan
  2. Department of Ophthalmology, Omiya Red Cross Hospital, 8-3-33 Yono-shi, Saitama, Japan
  3. Department of Ophthalmology, University of Tokyo School of Medicine, 7-3-1, Hongo, Bunkyo-ku, Tokyo, Japan
  1. KYOKO ONO,
  2. TETSURO OSHIKA
  1. Miyata Eye Hospital, 6-3, Kuraharacho, Miyakonojo-shi, Miyazaki, Japan
  2. Department of Ophthalmology, Omiya Red Cross Hospital, 8-3-33 Yono-shi, Saitama, Japan
  3. Department of Ophthalmology, University of Tokyo School of Medicine, 7-3-1, Hongo, Bunkyo-ku, Tokyo, Japan
  1. Kazunori Miyata, MD, Miyata Eye Hospital, 6-3, Kuraharacho, Miyakonojo-shi, Miyazaki, 885-0051, Japan miyata{at}miyata-med.ne.jp

https://doi.org/10.1136/bjo.85.2.238j

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    Editor,—Several cases of iatrogenic keratectasia have been reported after laser in situ keratomileusis (LASIK).1-4 Until now, there has been no report of keratectasia after phototherapeutic keratectomy (PTK), presumably because PTK employs less laser ablation of the corneal stroma than LASIK. Previous studies demonstrated that thickness of the residual stromal bed is critical in the development of this complication.134

    We describe a case of progressive corneal ectasia following PTK for the treatment of band keratopathy. Even though the residual corneal thickness was greater than 500 μm, the patient developed steepening of the cornea, irregular astigmatism, and progressive myopia.

    CASE REPORT

    A 76 year old woman was referred to Miyata Eye Hospital for the treatment of bilateral band keratopathy. She had no apparent systemic or ocular disorders related to the development of …

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