Development of a ciliary muscle driven accommodating intraocular lens
The elasticity of the capsule is held in check by the normal tension in the zonule so that accommodation consists in the relaxation of the tension in the zonule by the contraction of the ciliary muscle.
This permits the capsule to mold the lens into a more strongly curved system (Table 1).
The multifactorial basis for the development of presbyopia makes it difficult to be managed adequately.
The aging population, especially in western countries, has created millions of candidates around the world for such interventions.
Therefore, presbyopic surgery is one of the most difficult targets that a refractive surgeon will have to deal with today and in the immediate years.
Helmholtz (1856) proved that accommodation is accomplished by the change of the power of the crystalline lens associated with the active action of the ciliary body.
It is the difference in refractive power of the eye in the two states of complete relaxation and maximal accommodation.