July 2018
Volume 59, Issue 9
Open Access
ARVO Annual Meeting Abstract  |   July 2018
Five-year comparative observation of corneal endothelium and angle structure in laser iridotomy-treated and –untreated primary angle closure or its suspect eyes
Koichi Mishima; Naomi Mataki; Michiko Yonahara; Shinichiro Otani; Hiroshi Sakai; Atsuo Tomidokoro; Makoto Aihara; Kazunori Miyata; Aiko Iwase; Makoto Araie
Author Affiliations & Notes
  • Koichi Mishima
    ophthalmology, Kanto central Hospital, Setagaya-ku, Japan
    University of Tokyo, Graduate school of medicine, Tokyo, Japan
  • Naomi Mataki
    ophthalmology, Kanto central Hospital, Setagaya-ku, Japan
  • Michiko Yonahara
    Miyata Eye Hospital, Miyakonojo-city, Japan
  • Shinichiro Otani
    Miyata Eye Hospital, Miyakonojo-city, Japan
  • Hiroshi Sakai
    Department of Ophthalmology, University of the Ryukyus, faculty of medicine, Nakagami-gun, Japan
  • Atsuo Tomidokoro
    Tomidokoro Eye Clinic, Nakano-ku, Japan
  • Makoto Aihara
    University of Tokyo, Graduate school of medicine, Tokyo, Japan
  • Kazunori Miyata
    Miyata Eye Hospital, Miyakonojo-city, Japan
  • Aiko Iwase
    Tajimi Iwase Eye Clinic, Tajimi-city, Japan
  • Makoto Araie
    ophthalmology, Kanto central Hospital, Setagaya-ku, Japan
  • Footnotes
    Commercial Relationships   Koichi Mishima, None; Naomi Mataki, None; Michiko Yonahara, None; Shinichiro Otani, None; Hiroshi Sakai, None; Atsuo Tomidokoro, None; Makoto Aihara, Alcon Japan (F), Alconpharma (F), Allergan (R), AMO Japan (F), Canon (R), Carl Zeiss Meditec (R), CREWT medical systems (F), Glaukos (F), HOYA (C), Iridex (C), Ivantis (R), Kowa (F), LnnFocus (C), Nitten (R), Novaltispharma (F), Ono (F), Otsuka (F), Pfyzer (F), Santen (F), Senju (F), TOMEY (F), Wakamoto (F), Wakamoto (F); Kazunori Miyata, AMO Japan (F), Ancon Japan (F), GSK (F), HOYA (F), Kissei (F), Kowa (R), MSD (R), Novartis (F), Otsuka (F), Pfyzer (R), Santen (F), Senju (F), Shionogi (F), TOMEY (R), wakamoto (F); Aiko Iwase, Topcon (I); Makoto Araie, Tocon (P)
  • Footnotes
    Support  None
Investigative Ophthalmology & Visual Science July 2018, Vol.59, 6082. doi:
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      Koichi Mishima, Naomi Mataki, Michiko Yonahara, Shinichiro Otani, Hiroshi Sakai, Atsuo Tomidokoro, Makoto Aihara, Kazunori Miyata, Aiko Iwase, Makoto Araie; Five-year comparative observation of corneal endothelium and angle structure in laser iridotomy-treated and –untreated primary angle closure or its suspect eyes. Invest. Ophthalmol. Vis. Sci. 2018;59(9):6082.

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Abstract

Purpose : Laser iridotomy (LI) has been long used to treat eyes with primary angle closure glaucoma (PACG) or its related pathologies. However, several studies suggested deleterious effects of LI on corneal endothelial cells (CECs) and only 3-year post-LI effects on CECs were available in the literature. In this study, changes in the CEC density (CECD), central anterior chamber depth (CACD), and gonioscopic findings of LI-treated and -untreated eyes were followed for 5 years.

Methods : One hundred and thirteen newly LI-treated and 145 LI-untreated primary angle closure (PAC) or PAC-suspect (PAC) eyes of 113 and 145 subjects, respectively, were followed for 5 years with CECD, ultrasound biomicroscopic (UBM) and gonioscopic examinations every 12 months.

Results : Sixty three newly LI-treated eyes of 63 subjects completed 5-year follow-up without changing medications and 61 eyes of 61 subjects without LI (LI-untreated eyes). No significant inter-group differences were seen in the systemic or ocular factors except for treatment with LI with average energy of 806.9 ±547.2 mJ (standard deviation) mJ and a small difference in the age. No difference in the CECD change (P>0.20) was seen between the LI-treated (2648±299/mm2 at baseline before LI and 2623±303/mm2 at 5 years) and -untreated eyes (2579±326/mm2 at baseline and 2604±360/mm2 at 5 years), while CACD similarly decreased in the LI-treated (2.54±0.23mm at baseline before LI and 2.47±0.22mm at 5 year, P<0.001) and -untreated eyes (2.56±0.21mm at baseline and 2.51±0.23mm at 5-year, P=0.006). Goniscopic Shaffer grades increased in all quadrants in LI-treated eyes (P=0.018), while they decreased in all quadrants in the LI-untreated eyes (P< 0.001).

Conclusions : LI showed no significant effects on the CECD during the 5-year follow-up, while it significantly increased angle width.

This is an abstract that was submitted for the 2018 ARVO Annual Meeting, held in Honolulu, Hawaii, April 29 - May 3, 2018.

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
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Copyright © 2025 Association for Research in Vision and Ophthalmology.
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