In "Sans Rendez-vous" this Wednesday, Estelle, a listener who wears glasses, hesitates to switch to contact lenses.
But she does not know whether she should opt for flexible or rigid.
In reality, it depends "on the correction to be made and the state of a patient's eyes", explains Doctor Damien Gatinel, ophthalmic surgeon.
More discreet and less bulky, contact lenses can sometimes scare people who wear prescription glasses.
But just like choosing a frame, there are several types of lenses and making no mistakes is essential.
Estelle, a "Sans Rendez-vous" listener, wonders which model to choose: soft lenses or rigid lenses.
In reality, it depends "on the correction to be made and the state of the eyes of a patient", explains this Wednesday at the microphone of Europe 1 the doctor Damien Gatinel, ophthalmic surgeon and head of department at the Rothschild Foundation.
Soft lenses are more comfortable and more common
"The vast majority of adaptations are made with soft contact lenses," says the specialist.
"They are made of a hydrophilic material and are more comfortable since they deform and thus better conform to the shape of the cornea. Not to mention that they allow to correct almost all common visual defects."
>> Find all of Sans rendez-vous in replay and podcast here
In contrast
, rigid contact lenses are made of a hydrophobic material, so they do not absorb tears.
A very useful characteristic "for a patient who presents a deficit in the matter" points out Damien Gatinel.
They are also used in the case of a particular deformation of the cornea such as keratoconus, which gives the latter a cone shape.