Introduction
lenses, presbyopia, Contact lens wear
CONJUNCTIVA, LENS, PRESBYOPIA, NEAR VISION
Contact lens wear is one effective option for correcting ametropiaDry eyes, a common condition seen in ophthalmology clinicsMany contact lenses have been designed and developed using different materials and optical designs to correct presbyopia and have also been designed based on wearing needs to improve visual quality and visual comfort when wearing contact lenses for extended periodsLarge-diameter RGPs, also known as scleral contact lenses, are defined with a diameter > 12.5 mm. It is designed to only have direct contact with the ocular surface at the bulbar conjunctiva and thus create corneal vaults filled with preservative-free (PF) saline solution. The PF saline solution-filled space between corneal surface and the rear surface of the lens provides a stable tear filmLarge-diameter multifocal contact lenses, whether soft or rigid, are designed for simultaneous vision with minimal movement to achieve a translating effect. These multifocal contact lenses can further be categorized as center-near (CN) for improved near vision with a trade-off of blurrier distant vision, and center-distant (CD) for the vice versa