CREST EDOF vs MyDay MF for the Correction of Presbyopia
Research type
Research Study
Full title
CREST EDOF CONTACT LENSES VS MYDAY® CONTACT LENSES FOR THE CORRECTION OF PRESBYOPIA
IRAS ID
322080
Contact name
Michel Guillon
Contact email
Sponsor organisation
Brien Holden Vision Institute (BHVI)
ISRCTN Number
ISRCTN55634631
Duration of Study in the UK
1 years, 0 months, 1 days
Research summary
The correction of presbyopia (need for different corrections for far and near vision) with contact lenses is by a type of contact lenses called simultaneous vision contact lenses, where the contact lenses are always present within the pupil with both far and near corrections, resulting in the brain subconsciously selecting the relevant image. Only part of the pupil is used for far or near vision, the strength of the image produced weakens and the contrast of the scene observed is decreased, where at times wearers complain of unwanted effects such as haloes around lights. The way the far and near corrections are distributed over the pupil affects both the quality of vision and the severity of the symptoms. There are a number of mutlifocal contact lenses currently on the market all with different propriety designs achieving different levels of success. Furthermore, presbyopia increases with age (the difference between far and near corrections increases) therefore achieving the correct split between distance and near becomes more challenging. \n\nThe vision institute (BHVI) at the University of New South Wales has developed a proprietary, patented, contact lens design for presbyopia using an optical design providing an extended depth of focus that is thought to produce superior performance and acceptance for the most challenging part of the contact lens wearing population; medium and high add presbyopes. \n\nThe rationale for the current study is, therefore, to investigate the performance and acceptance of the new contact lenses in relation to a leading design MyDay® multifocal to assess its potential visual performance and acceptance benefits for the correction of medium to high add presbyopes.
REC name
South East Scotland REC 02
REC reference
23/SS/0009
Date of REC Opinion
22 Feb 2023
REC opinion
Further Information Favourable Opinion