Universität zu Köln

Li, Xueting ORCID: 0000-0002-4146-8991 (2024). Quantifying Dermatochalasis Using 3-Dimensional Photogrammetry. PhD thesis, Universität zu Köln.

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Abstract

The main objectives of this study, titled "Quantifying Dermatochalasis Using 3- Dimensional Photogrammetry", are to characterize patients with dermatochalasis. The results were obtained by analyzing periocular features in 145 dermatochalasis patients using standardized 3D imaging provided by the VECTRA M3 3D imaging system. Dermatochalasis typically affects both eyes simultaneously, and the relationships between PFW, LPML, and age were discovered. We conducted an analysis involving various clinical measurements, including palpebral fissure height (PFH), palpebral fissure width (PFW), upper lid fold-palpebral margin distance (FPD), upper palpebral margin length (UPML), lower palpebral margin length (LPML), canthal tilt (CT), palpebral fissure index (PFI), upper eyelid area, and ocular surface area. The 145 participants were all Caucasian, comprising 48 males and 97 females, aged between 35 and 91 years. The analysis revealed that among males, there were no significant differences in parameters. In the female group, the left-side PFH was slightly larger than the right-side PFH (P = 0.023), but the difference was less than 1 mm. The corresponding PFI also exhibited a difference in the female group (P = 0.009). Gender differences analysis indicated that PFH and PFW measurements were significantly greater in males (9.680 ± 1.542 mm, 27.146 ± 2.689 mm, respectively) than in females (8.995 ± 1.494 mm, 25.884 ± 2.913 mm, respectively) (both P < 0.001). However, males had a shorter FPD (2.470 mm [3.658]) than females (3.051 mm [3.922]). Additionally, the male group had longer eyelids (UPML 35.830 ± 4.342 mm; LPML 29.762 ± 3.277 mm) than females (UPML 33.622 ± 4.417 mm; LPML 28.474 ± 3.246 mm). Furthermore, the exposed ocular surface area in males was greater than in females (2.069 ± 0.515 mm² and 1.895 ± 0.483 mm², respectively), and the male upper eyelid area (5.236 ± 1.179 mm²) was smaller than that of females (6.153 ± 1.382 mm²). Additionally, PFW (R = -0.523, p < 0.001)decreased moderately with age among males. The correlation between UPML and age was weak (R = -0.367, P = 0.010). Among females, moderate correlations were found between age and PFW (R = -0.566, P <0.001) and LPML (R = -0.537, P < 0.001). PFH (R = -0.315, P = 0.002), UPML (R = -0.381, P < 0.001), and ocular surface area (R = -0.457, P < 0.001) showed weak correlations with age. Understanding age-related changes in the periocular region is crucial for planning surgical procedures. It highlights the need to consider both age and sex-related factors when formulating treatment plans for dermatochalasis patients in the future. When assessing patients with eyelid skin laxity, it's essential to evaluate the condition of their inner and outer canthal ligaments. During blepharoplasty, special attention should be paid to the skin near the lateral canthus, and the amount of resection may need adjustment. Furthermore, as patients age, it becomes increasingly important to focus on postoperative complications, particularly lower eyelid malposition. This study demonstrates age-related alterations in Caucasians, with significant variations across ages and sexes in periocular characteristics. Undoubtedly, similar discrepancies exist in other races. Further investigation and clinical data collection will be necessary for enhanced surgical planning.

Item Type:	Thesis (PhD thesis)
Creators:	Creators Email ORCID ORCID Put Code Li, Xueting xuetinglieye@gmail.com orcid.org/0000-0002-4146-8991 UNSPECIFIED
URN:	urn:nbn:de:hbz:38-732748
Date:	2024
Language:	English
Faculty:	Faculty of Medicine
Divisions:	Faculty of Medicine > Augenheilkunde
Subjects:	Medical sciences Medicine
Uncontrolled Keywords:	Keywords Language Dermatochalasis English Periocularmorphology English Anthropometry English Three-dimensional imaging English
Date of oral exam:	10 June 2024
Referee:	Name Academic Title Heindl, Ludwig Dr. med. Dr. phil. Schick, Tina Privatdozentin Dr. med.
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/73274