Ring-shaped dysphotopsia associated with posterior chamber phakic implantable collamer lenses with a central hole
- Authors
- Eom, Youngsub; Kim, Dae Wook; Ryu, Dongok; Kim, Jun-Heon; Yang, Seul Ki; Song, Jong Suk; Kim, Sug-Whan; Kim, Hyo Myung
- Issue Date
- 5월-2017
- Publisher
- WILEY
- Keywords
- central hole; dysphotopsia; posterior chamber phakic implantable collamer lenses
- Citation
- ACTA OPHTHALMOLOGICA, v.95, no.3, pp.E170 - E178
- Indexed
- SCIE
SCOPUS
- Journal Title
- ACTA OPHTHALMOLOGICA
- Volume
- 95
- Number
- 3
- Start Page
- E170
- End Page
- E178
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/83549
- DOI
- 10.1111/aos.13248
- ISSN
- 1755-375X
- Abstract
- PurposeTo evaluate the incidence of central hole-induced ring-shaped dysphotopsia after posterior chamber phakic implantable collamer lens (ICL) with central hole (hole ICL) implantation and to investigate the causes of central hole-induced dysphotopsia. MethodsThe clinical study enrolled 29 eyes of 15 consecutive myopic patients implanted with hole ICL. The incidence of ring-shaped dysphotopsia after hole ICL implantation was evaluated. In the experimental simulation study, non-sequential ray tracing was used to construct myopic human eye models with hole ICL and ICL without a central hole (conventional ICL). Simulated retinal images measured in log-scale irradiance were compared between the two ICLs for an extended Lambertian light-emitting disc object 20cm in diameter placed 2m from the corneal vertex. To investigate the causes of hole-induced dysphotopsia, a series of retinal images were simulated using point sources at infinity with well-defined field angles (0 to -20 degrees) and multiple ICL models. ResultsOf 29 eyes, 15 experienced ring-shaped dysphotopsia after hole ICL implantation. The simulation study using an extended Lambertian source showed that hole ICL-evoked ring-shaped dysphotopsia was formed at a retinal field angle of 40 degrees. Component-level analysis using a well-defined off-axis point source from infinity revealed that ring-shaped dysphotopsia was generated by stray light refraction from the inner wall of the hole and the posterior ICL surface. ConclusionHole ICL-evoked ring-shaped dysphotopsia was related to light refraction at the central hole structure. Surgeons are advised to explain to patients the possibility of ring-shaped dysphotopsia after hole ICL implantation.
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Collections - College of Medicine > Department of Medical Science > 1. Journal Articles
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