Analysis of vibrations transmitted to the feet of a wheelchair user.

: The aim of the study was to quantitatively evaluate the vibrations received on the wheelchair footrest and to determine whether wheelchair users are at risk of vibration-white foot. This assessment was made using the ISO 2631 standard. : The measurements were taken on the footrest of a universal wheelchair.

Experimental study of the influence of using polyurethane cushion to reduce vibration received by a wheelchair user.

Purpose: The aim of this experimental study was to compare the ability of polyurethane cushions of three arbitrary selected thicknesses to minimize vibrations transmitted from the wheelchair to its user.

Methods: Measurements were made during passive motion on five different surfaces often found in public spaces. Two tests were carried out during the measurements.

Influence of Selected Ophthalmic Fluids on the Wettability and Hydration of Hydrogel and Silicone Hydrogel Contact Lenses-In Vitro Study.

This study attempts to evaluate the effect of incubation in selected ophthalmic fluids on contact lenses (Etafilcon A, Omafilcon A, Narafilcon A, Senofilcon A). Four research groups differing in the incubation environment were created: (1) initial state, (2) contact lens solution (CLS), (3) contact lens solution and eye drops (ED) and (4) eye drops. Dehydration by gravimetric method and the contact angle (CA) by the sessile drop method were tested.