High diopter spectacle using a flexible Fresnel lens with a combination of grooves.
Opt Express
; 30(21): 38371-38382, 2022 Oct 10.
Article
em En
| MEDLINE
| ID: mdl-36258404
ABSTRACT
In this study, the Fresnel lens was investigated as a potential candidate for vision correction in patients with myopia. A few previous studies have suggested this idea; however, Fresnel lenses are limited by their aesthetics and quality. Therefore, we designed a combination of Fresnel lens grooves with a constant height and pitch of 13 µm and 0.1 mm, respectively, to overcome the limitations caused by ultra-precision machining with a tool nose radius of 30 µm. A thin replicated Fresnel lens with a power of -5 diopter was procured and applied directly as spectacles that are unattached to the normal lens. The optical performance and image quality of the Fresnel lens were compared with those of a conventional lens possessing the same power in both near and far vision. These results extend the applicability for the use of Fresnel lenses as vision-correcting ophthalmological lenses and imaging systems.
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Óculos
/
Miopia
Limite:
Humans
Idioma:
En
Ano de publicação:
2022
Tipo de documento:
Article