Response of the Aging Eye to First Day of Modern Material Contact Lens Wear.

Objectives: To investigate the ocular surface of an aged population wearing a daily disposable contact lens (CL) over their 1st day of wear.

Methods: Forty eyes from 40 presbyopic subjects were fitted a daily CL (Delefilcon A). Tear osmolarity, tear meniscus area (TMA), and ocular surface aberrations (total higher-order root mean square [RMS]) were assessed at baseline (t0), at 20 min (t1) and after 8 hr (t2) of wear.

Application of nanoimprinting technique for fabrication of trifocal diffractive lens with sine-like radial profile.

The fabrication of submicron-height sine-like relief of a trifocal diffractive zone plate using a nanoimprinting technique is studied. The zone plate is intended for use in combined trifocal diffractive–refractive lenses and provides the possibility to form trifocal intraocular lenses with predetermined light intensity distribution between foci. The optical properties of the designed zone plate having the optical powers 3 D, 0, −3D in the three main diffraction orders are theoretically and experimentally investigated.

Effect of a liposomal spray on the pre-ocular tear film.

Purpose: With the potential to address evaporative dry eye, a novel spray has been developed in which phospholipid liposomes are delivered to the tear film via the surface of the closed eyelid. This study evaluated the short-term effects of liposomal spray application on the lipid and stability characteristics of the pre-ocular tear film in normal eyes.

Methods: Twenty-two subjects (12M, 10F) aged 35.

Comparison of near visual acuity and reading metrics in presbyopia correction.

Purpose: To provide a consistent standard for the evaluation of different types of presbyopic correction.

Setting: Eye Clinic, School of Life and Health Sciences, Aston University, Birmingham, United Kingdom.

Methods: Presbyopic corrections examined were accommodating intraocular lenses (IOLs), simultaneous multifocal and monovision contact lenses, and varifocal spectacles.

Optimizing measurement of subjective amplitude of accommodation with defocus curves.

Purpose: To determine whether letter sequences and/or lens-presentation order should be randomized when measuring defocus curves and to assess the most appropriate criterion for calculating the subjective amplitude of accommodation (AoA) from defocus curves.

Setting: Eye Clinic, School of Life & Health Sciences, Aston University, Birmingham, United Kingdom.

Methods: Defocus curves (from +3.