Discover the most talked about and latest scientific content & concepts.

Concept: Corrective lenses


This literature review looks at the current status of multifocal intraocular lenses (IOLs) in cataract surgery. The results of implantation of multifocal IOLs of diffractive, refractive, and hybrid diffractive-refractive design are described with regard to uncorrected near and distance visual acuity and spectacle independence. The occurrence of photic phenomena and contrast sensitivity loss with multifocal IOLs are also addressed. FINANCIAL DISCLOSURE: Neither author has a financial or proprietary interest in any material or method mentioned.

Concepts: Visual acuity, Ophthalmology, The Current, Contact lens, Intraocular lens, Eye surgery, Cataract, Corrective lenses



To evaluate a method for measuring the cylinder, sphere, and wavefront of progressive addition lenses (PALs) in eyeglass frames.

Concepts: Java, Progressive lens, Corrective lens, Corrective lenses, Glasses


The manuscript presents a review of recently published studies reporting objective and subjective outcomes and preoperative considerations of asymmetrical multifocal intraocular lenses (IOLs).

Concepts: Intraocular lens, Objective pronoun, Corrective lenses, Asymmetric warfare


To develop a methodology to reliably determine the thickness profile of scleral contact lenses and examine the relationship between the centre and average lens thickness for a range of lens designs and back vertex powers.

Concepts: Cornea, Myopia, Lens, Contact lens, Corrective lens, Intraocular lens, Corrective lenses, Scleral lens


To evaluate monocular and binocular visual outcomes for near, intermediate, and far distance in patients implanted with diffractive multifocal intraocular lenses (IOLs) with different add power contralaterally.

Concepts: Intraocular lens, Corrective lenses


Multifocal intraocular lenses (IOLs) can be associated with unwanted visual phenomena, including halos. Predicting potential for halos is desirable when designing new multifocal IOLs. Halo images from 6 IOL models were compared using the Optikos modulation transfer function bench system and a new high dynamic range (HDR) system.

Concepts: Signal processing, High dynamic range imaging, Intraocular lens, Corrective lenses, Transfer function, Optical transfer function


To quantify tear elimination rate (ER) underneath silicone hydrogel (Si-Hy) and scleral gas permeable (GP) contact lenses (CLs).

Concepts: Cornea, Lens, Contact lens, Contact lenses, Corrective lens, Keratoconus, Corrective lenses, Scleral lens


To determine if the discontinuation of commercially-available simultaneous vision Multifocal Soft Contact Lenses is independent from the multifocal design. To determine causes for discontinuation and psychosocial factors involved.

Concepts: Randomized controlled trial, Design, Contact lens, Corrective lens, Graphic design, Design management, Corrective lenses, Glasses


To examine and assess the halos generated in distance vision by multifocal intraocular lenses (IOLs) using both in vitro objective and in vivo subjective methods.

Concepts: In vivo, In vitro fertilisation, In vitro, Lens, Intraocular lens, Objective pronoun, Corrective lenses