At EuroEyes, cataract surgery with a simple monofocal lens costs from 2,700 euros per eye and with a multifocal lens or trifocal lens from 3,300 euros per eye. The multifocal lenses cure not only cataract, but also any other existing defective vision, no visual aid is needed afterwards.
Cataract surgery with the use of monofocal lenses is fully covered by the statutory health insurance (GKV) as well as by most private health insurances (PKV). Only additional examinations prior to lens surgery, such as biometry by laser or coherence tomography, are additional services that must be paid for by the statutory health insurance as IgeL services.
The use of multifocal lenses or trifocal lenses is not a statutory health insurance benefit and must be paid for by the patient. However, many private health insurances cover the costs for multifocal lenses completely or at least proportionally. It is best to contact your health insurance company directly.
In principle, you can deduct the surgical correction of your defective vision to improve your work performance from your taxes as an extraordinary burden within the meaning of § 33 EStG.