Journals / Phoenix Medical Journal / 2026 / Cilt: 8 Sayı: 2

Effect of Müller Muscle–Conjunctival Resection on Pupil Diameter Under Different Lighting Conditions: A Clinical Study

Farklı Aydınlatma Koşulları Altında Müller Kası ve Konjonktiva Rezeksiyonunun Pupil Çapı Üzerindeki Etkisi: Klinik Bir Çalışma

Mehmet Göksel Ulaş(SAĞLIK BİLİMLERİ ÜNİVERSİTESİ, İSTANBUL BEYOĞLU GÖZ SAĞLIK UYGULAMA VE ARAŞTIRMA MERKEZİ)0000-0001-7049-7065
Korhan Fazıl(Okuloplastik ve Orbital Cerrahi ve Okuler Onkoloji Merkezi)0000-0002-5808-7634
Pages
342–347
Publication Date
2026-07-10
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AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

However, further prospective studies with larger patient populations are required to confirm these observations.

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Objective & Hypothesis:Objective: To evaluate the effect of Müller Muscle–Conjunctival Resection (MMCR) on pupil diameter under different lighting conditions and to evaluate whether MMCR is associated with measurable postoperative changes in pupil diameter under different lighting conditions in patients with blepharoptosis.
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Key Findings & Data:Material and Methods: This retrospective clinical study included 34 eyes of 34 patients who underwent MMCR for mild-to-moderate ptosis with good levator function and a positive phenylephrine test.
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Conclusion & Impact:However, further prospective studies with larger patient populations are required to confirm these observations.
🔬Design:Araştırma Makalesi
📍Scope:Comprehensive Sample
⚙️Variables:Kapak refle mesafesi · Müller kas konjonktiva rezeksiyonu · Pitozis

Abstract

Objective: To evaluate the effect of Müller Muscle–Conjunctival Resection (MMCR) on pupil diameter under different lighting conditions and to evaluate whether MMCR is associated with measurable postoperative changes in pupil diameter under different lighting conditions in patients with blepharoptosis. Material and Methods: This retrospective clinical study included 34 eyes of 34 patients who underwent MMCR for mild-to-moderate ptosis with good levator function and a positive phenylephrine test. All surgeries were performed by a single experienced surgeon. Preoperative and postoperative (1 and 3 months) assessments included margin reflex distance-1 (MRD-1), comprehensive ophthalmic examination, and static pupillometry using an infrared-based device. Scotopic (0.04 lux), mesopic (4.0 lux), and photopic (40.0 lux) pupil diameters were recorded under standardized environmental conditions. Repeated measurements were analyzed using the Friedman test with Bonferroni-corrected post hoc comparisons. A p value 0.05). No clinically relevant pupillary abnormalities or ocular surface complications were detected. One eyelid with inadequate correction underwent subsequent levator surgery. Conclusions: MMCR significantly improved eyelid height without detectable statistically significant changes in pupil diameter under varying lighting conditions. These findings may have implications for the surgical outcomes of refractive and ptosis surgeries. However, further prospective studies with larger patient populations are required to confirm these observations.

Özet

Amaç: Müller Kas-Konjonktiva Rezeksiyonu’nun (MKKR) farklı aydınlatma koşulları altında pupil çapı üzerindeki etkisini değerlendirmek ve MMCR’nin blefaropitozisli hastalarda farklı aydınlatma koşulları altında pupil çapında ölçülebilir postoperatif değişikliklerle ilişkili olup olmadığını değerlendirmek. Gereç ve Yöntem: Bu retrospektif klinik çalışma, iyi levator fonksiyonu ve pozitif fenilefrin testi olan hafif ila orta derecede pitozis nedeniyle MKKR uygulanan 34 hastanın 34 gözünü içermiştir. Tüm ameliyatlar tek bir deneyimli cerrah tarafından gerçekleştirilmiştir. Ameliyat öncesi ve sonrası (1 ve 3 ay) değerlendirmeler, kapak refle mesafesi-1 (KRM-1), kapsamlı oftalmik muayene ve kızılötesi tabanlı bir cihaz kullanılarak statik pupilometriyi içermiştir. Skotopik (0,04 lüks), mezopik (4,0 lüks) ve fotopik (40,0 lüks) pupil çapları standartlaştırılmış çevresel koşullar altında kaydedilmiştir. Tekrarlanan ölçümler, Bonferroni düzeltmeli post hoc karşılaştırmalarla Friedman testi kullanılarak analiz edildi. p değeri 0,05). Klinik olarak önemli pupil anormallikleri veya okuler yüzey komplikasyonları tespit edilmemiştir. Yetersiz düzeltme gösteren bir göz kapağına daha sonra levator cerrahisi uygulanmıştır. Sonuçlar: MKKR, farklı aydınlatma koşulları altında pupil çapında istatistiksel olarak anlamlı bir değişiklik olmadan, göz kapağı yüksekliğini önemli ölçüde yükseltmiştir. Bu bulgular, son zamanlarda yapılan refraktif ve pitozis ameliyatlarının cerrahi sonuçları açısından önemli sonuçlar doğurabilir ve geniş hasta gruplarıyla yapılacak prospektif çalışmalarla daha ayrıntılı olarak değerlendirilmesi gerekmektedir.

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Cite This Article

Ulaş, M. G., Fazıl, K. (2026). Effect of Müller Muscle–Conjunctival Resection on Pupil Diameter Under Different Lighting Conditions: A Clinical Study. Phoenix Medical Journal, Cilt: 8 Sayı: 2, 342–347. https://doi.org/10.38175/phnx.1947800

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