Intraocular lens and treatment apparatus
The disclosure relates to an intraocular lens having an optic body and a haptic element including a thermoresponsive polymer having a transition temperature and particles that are magnetic and/or magnetizable. The disclosure additionally relates to a treatment apparatus including the intraocular lens and a magnet set up to subject the intraocular lens to a magnetic field that alternates with time.
1 . An intraocular lens, comprising:
an optic body; and
a haptic element including a thermoresponsive polymer having a transition temperature and particles that are magnetic and/or magnetizable,
wherein the thermoresponsive polymer forms the surface of the haptic element at least in part of a region of the haptic element and is set up such that a chemical bond of the thermoresponsive polymer breaks on exceedance of the transition temperature.
2 . The intraocular lens as claimed in claim 1 , wherein the particles have been embedded in the thermoresponsive polymer.
3 . The intraocular lens as claimed in claim 1 , wherein the transition temperature is higher than 35° C. or higher than 42° C.
4 . The intraocular lens as claimed in claim 1 , wherein the thermoresponsive polymer is set up to change its properties on exceedance of the transition temperature such that, when the intraocular lens is disposed in a capsular bag of an eye, the haptic element is more firmly secured to the capsular bag.
5 . The intraocular lens as claimed in claim 1 , wherein the particles are superparamagnetic.
6 . The intraocular lens as claimed in claim 1 , wherein the particles include iron oxide or consist of iron oxide.
7 . The intraocular lens as claimed in claim 1 , wherein the thermoresponsive polymer has a glass transition temperature or a melting temperature as the transition temperature and the haptic element is set up to change a shape of the haptic element on exceedance of the transition temperature.
8 . The intraocular lens as claimed in claim 7 , wherein the haptic element is set up to change shape irreversibly on exceedance of the transition temperature.
9 . The intraocular lens as claimed in claim 7 , wherein the haptic element includes a composite material including an elastomer and the thermoresponsive polymer, and
wherein the elastomer is under mechanical stress prior to the exceedance of the transition temperature.
10 . The intraocular lens as claimed in claim 7 , wherein the shape of the haptic element is a wavy shape at least in part of the region of the haptic element above the transition temperature.
11 . The intraocular lens as claimed in claim 7 , wherein the haptic element has an edge above the transition temperature at least in part of the region of the haptic element and is edge-free below the transition temperature in that part of the region.
12 . The intraocular lens as claimed in claim 7 , wherein the haptic element has a larger surface area above the transition temperature than below the transition temperature.
13 . The intraocular lens as claimed in claim 1 , wherein the thermoresponsive polymer forms the surface of the haptic element at least in part of the region of the haptic element and the transition temperature is an upper critical solution temperature of the thermoresponsive polymer in a solvent or a lower critical solution temperature of the thermoresponsive polymer in the solvent.
14 . The intraocular lens as claimed in claim 13 , wherein the solvent includes water or consists of water.
15 . The intraocular lens as claimed in claim 14 , wherein an active ingredient is embedded in the thermoresponsive polymer and the thermoresponsive polymer is set up to release the active ingredient on exceedance of the transition temperature.
16 . The intraocular lens as claimed in claim 1 , wherein the chemical bond breaks irreversibly when the transition temperature is exceeded.
17 . The intraocular lens as claimed in claim 1 , wherein the thermoresponsive polymer has two longitudinal ends each bonded to a part of the haptic element other than the thermoresponsive polymer.
18 . A treatment apparatus, comprising:
an intraocular lens as claimed in claim 1 ; and
a magnet set up to subject the intraocular lens to a magnetic field that alternates with time.
19 . An intraocular lens, comprising:
a first thermoresponsive polymer which forms a surface of a haptic element at least in that part of a region of the haptic element; and
a second thermoresponsive polymer which has a glass transition temperature or a melting temperature and is set up to irreversibly change the shape of the haptic element on exceedance of the transition temperature.