We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
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
- Abstract
Purpose To 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. Methods The 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 20 cm in diameter placed 2 m 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°) and multiple ICL models. Results Of 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°. 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. Conclusion Hole 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.
- Subjects
DISEASE incidence; POSTERIOR segment (Eye); EYE diseases; CONTACT lenses; MYOPIA treatment
- Publication
Acta Ophthalmologica (1755375X), 2017, Vol 95, Issue 3, pe170
- ISSN
1755-375X
- Publication type
Article
- DOI
10.1111/aos.13248