Blepharoptosis is an abnormally low position of the upper eyelid in relation to the eyeball due to its omission. The method of surgical treatment of blepharoptosis depends on the function of the levator.The aim. To analyze the results of surgical treatment of partial blepharoptosis of various etiology by the dosed muscle-conjunctival resection of the upper eyelid cartilage.Material and methods. We operated 78 patients (82 eyes) with blepharoptosis, among them with congenital blepharoptosis – 34 people (36 eyes), with acquired – 44 (46 eyes). The patients’ age was from 6 to 82 years.Inclusion criteria: the function of the upper eyelid levator – more than 5 mm, the width of the palpebral fissure – 3 mm or more.The patients underwent a dosed muscle-conjunctival resection of the upper eyelid cartilage in the period from 2018 to 2021. The follow-up period ranged from 2 months to 2 years.Results. Elimination of blepharoptosis was achieved in all patients. With congenital blepharoptosis, a good result was obtained in 33  people (91.7  %), satisfactory – in three patients (8.3 %), which was associated with the asymmetry of the palpebral fissure, for the correction of which these patients underwent additional intervention. In patients with acquired ptosis of the upper eyelid, a good result was achieved in 91.3 % of cases (42 eyes). One patient underwent repeated surgery due to hypocorrection and asymmetry of the palpebral fissure width after the first surgery.In all patients, the result remained stable throughout the observation period.Conclusion. The use of the method of dosed muscle-conjunctival resection of the upper eyelid cartilage in patients with partial ptosis of the upper eyelid and intact levator function made it possible to obtain a good cosmetic and functional result: with congenital blepharoptosis – in 91.7 % of cases, acquired ptosis of the upper eyelid – in 91.3 % patients.

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Blepharoptosis is currently a serious pathology, the treatment of which does not always bring a satisfactory result. The article provides a review of the literature, describes the methods of surgical treatment of this ophthalmopathology. Each method is distinguished by indications, outcomes, efficiency. The method of surgical intervention depends on the cause of ptosis, the function of the levator muscle, the patient's age, visual acuity and a number of other indicators, but the main criteria are the degree of preservation of the levator function and lowering of the upper eyelid. The classic algorithm for treating patients with blepharoptosis involves shortening the levator or suspending the muscle that raises the upper eyelid to the eyebrow. Key words: ptosis of the upper eyelid, resection of the levator, function of the levator, operations of suspending type.

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