Intraocular lens with iris diaphragm

Abstract

The invention discloses an artificial lens with an iris diaphragm, comprising an optical zone (1) which is transparent at the center, the iris diaphragm (2) surrounding the optical zone (1) and a loop (3); the artificial lens is in an integrated style and is composed of an entire block of material, the material is selected from foldable materials such as hydrophobic acrylic ester, hydrophilic acrylic ester, silica gel, etc. The artificial lens with the iris diaphragm of the invention has soft texture, can be filled or implanted in the eyes by a small incision after being folded; in addition, the artificial lens has high refractive index, thin lens, small incision and slow formation of after cataract and can slowly restore in 2-30 seconds after being implanted, thus cyst membrane is not easy to be damaged; moreover, the artificial lens has the advantages of little astigmia developed in post-operation, quick healing, fast recovery of visual performance and little postoperative treatment; a brown iris, which is the natural color iris of Chinese, can be adopted, and the eye implanted with such an artificial lens looks more natural.

Description

technical field [0001] The invention belongs to an ophthalmic medical product, in particular to an intraocular lens with an iris septum. Background technique [0002] The causes of iris defect or aniridia mainly include congenital and traumatic factors, mainly manifested as photophobia in the affected eye, especially in patients with traumatic monocular aniridia, the symptoms are more obvious. In addition, the pupil is too large or not round, which also affects the appearance of the patient. Clinically, contact lenses have been used for correction, but this method is cumbersome, especially not suitable for children and the elderly. For patients with aniridia, pupil diameter > 8 mm, and iris defect range > 120° caused by trauma or congenital factors, the posterior chamber hard intraocular lens with black iris septum produced by Morcher Company in Germany is mainly used, which can be divided into 67A, 67B, 67C, 67D, 67E, and 67G 6 types. At present, 67G type is mostly u...

AI Technical Summary

Problems solved by technology

[0004] Disadvantages of rigid intraocular lens with black iris septum include: (1) large body, brittle material, and easy to break; (2) large incision is required, about 10.0 mm, and severe corneal astigmatism after operation; (3) intraocular lens with black iris septum The diameter of the distance between the optical surface and the iris reaches 10.0mm. If there is insufficient space in the anterior and posterior chambers of the eye, the cornea, posterior capsule or vitreous body will be easily damaged during the implantation process.

This type of intraocular lens is not suitable for implantation in the eyes of patients with congenital microphthalmia. This is because the diameter of the optical surface of the intraocular lens and the iris septum is 10.0 mm, and the distance between the apex of the double loop is 12.5 mm. The eye will be difficult to fix in the correct position

(4) The PMMA of the optical part and the iris part of the peripheral black PMMA are not integrated, but connected together. Clinically, adverse events of the separation of the optical part and the iris part have been found

[0005] For those with a large iris defect or complete aniridia, in addition to implanting a hard intraocular lens with iris septum, it also includes implanting a multi-piece fan-shaped artificial iris capsular tension ring in the lens capsular bag with a small incision, and then implanting a foldable intraocular lens. , the degree of postoperative corneal astigmatism is relatively small, but the operation still has the disadvantages of narrow indication range, relatively crowded space for lens capsular bag implantation, and easy breakage of the black PMMA tension ring.

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