The aim of this thesis is to study 20 cases of blepharoptosis who were followed-up among many patients who received ptosis surgery at Kyungpook National University Hospital from Jan. 1980 to April 1984.
To obtain the best surgical results in blepharoptosis, it was necessary to select the appropriate operation form each case according to levator function, the amount of ptosis, its etiology, as well as other factors.
In cases of 4.1mm or more levator function, the author attempted to resect the levator muscle, but in cases of between 3mm and 4mm, the combination of levator muscle resection and frontalis sling was selected.
On the other hand, in cases of 3mm or less levator function the fontalis sling was selected combined with fascia lata.
The results were as follows;
1. The ratio of congenital versus acquired ptosis was 17 : 3.
2. Among 17 cases of congenital ptosis, male versus female was 11 : 6, and monocular versus bi-ocular was 9 : 8. Among 9 cases of congenital monocular ptosis, Lt. versus Rt. eye incidence was 5 : 4.
3. Among 3 cases of acquired ptosis, the causes were traumatic, neurofibromatosis, and birth injury respectively in each separate case.
4. In 5 of the congenital cases, blepharophimosis was combined, and in 4 strabismus was observed.
5. In the amount of ptosis, 7 cased were belew 2mm, 3 cases between 2.1∼4,9mm, and 10 cases above 5mm. In the measurement of the lavator muscle function, 7 cases were belew 3.0mm, 2 cases between 3.1∼4mm, and 11 cases above 4.1mm.
6. The best results were obtained by the levator muscle resection: Which was done for the patients with more than 4.1mm of levator muscle function. Good to excellent results were obtained in 8 cases among 10 cases.
7. The combination of levator muscle resection and frontalis sling was done for the patients with levator muscle function of 3.1mm∼4mm, and gave poor results.
8. Undercorrection and lid fold deformity were the most common types, except for lid lag and lagophthalmos in sleeping.
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