Contrast Sensitivity Clinical Trial
Official title:
The Effect of Upper Blepharoplasty on Anatomical and Functional Aspects of Vision in the Early Postoperative Period
Contrast sensitivity (CS) and tear film (TF) changes are noted in late postoperative period after upper blepharoplasty (UB), while the same was rarely investigated in the early postoperative period. The reason for aforementioned improvement of vision quality is unclear. Suggested explanations include changes in higher-order aberrations, elimination of the overlay effect created by excess skin on the upper eyelids and/or eyelashes directed toward the eyelid, or changes in corneal topography (CT) and keratometry. Furthermore, there is no consensus on the best technique for UB. Due not only to different surgical techniques, but also to different methods of measuring the tear film quality, it is very difficult to quantify the aforementioned studies. While changes in tear volume parameters and changes in tear film (TF) rupture have been investigated in detail, changes in the lipid layer have rarely been investigated. According to previous studies, there are different findings about changes in CT after UB. The aim of the research is to determine whether there are anatomical (CT) and functional (TF and CS) changes in subjects with functional dermatochalasis before the procedure and in a month-long postoperative period. The research is conducted on examinees diagnosed by clinical examination with functional dermatochalasis with the exclusion of examinees with ocular or systemic conditions affecting TF, best corrected visual acuity or CT. Detailed medical history and ophthalmologic examination will be performed with grading of the external appearance of the upper eyelids. All diseases and conditions that can lead to changes in CS, TF or corneal defects will be noted. Preoperatively all subjects will have CS recorded in photopic conditions, TF analysis and CT (Keratograph 5M, OCULUS Optikgeraete GmbH, Wetzlar, Germany). UB will be performed in the operating room at the UED. At first (seven days postoperatively) and second (one month postoperative) check-up a CS check will be performed at the UED and TF analysis and CT at Lens LTD.
Status | Recruiting |
Enrollment | 40 |
Est. completion date | December 1, 2025 |
Est. primary completion date | November 1, 2025 |
Accepts healthy volunteers | No |
Gender | All |
Age group | 45 Years to 90 Years |
Eligibility | Inclusion Criteria: - Patients with functional dermatochalasis on the upper eyelid with subjective difficulties due to obstructing the upper part of visual field: swelling of the eyelids in the morning with difficulties in opening the eyes, use of the frontal musculature to be able to have at least a partial width of the field of vision in the upper part that is adequate for daily functioning, and headaches. Exclusion Criteria: - History of corneal refractive surgery, pterygium, glaucoma, nuclear sclerosis > 4th degree, severe dry eye, age-related macular degeneration, neuro-ophthalmological diseases, use of hormone therapy, diabetic retinopathy or condition after panretinal photocoagulation. Corneal pathologies such as keratoconus and gross eyelid malposition conditions such as entropion, ectropion and marked laxity of the eyelids are also grounds for exclusion from the study. |
Country | Name | City | State |
---|---|---|---|
Croatia | Osijek University Hospital | Osijek |
Lead Sponsor | Collaborator |
---|---|
Osijek University Hospital |
Croatia,
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* Note: There are 13 references in all — Click here to view all references
Type | Measure | Description | Time frame | Safety issue |
---|---|---|---|---|
Primary | Contrast sensitivity | Measurement of contrast sensitivity using Pelli-Robson chart with best corrected visual acuity in photopic condions | Measurement will take place preoperatively, 7 days and one month postoperatively. Planned duration of the examination is five minutes | |
Secondary | Corneal topography | Measurement of corneal topography using Keratograph 5M, OCULUS Optikgeraete GmbH, Wetzlar, Germany | Measurement will take place preoperatively, 7 days and one month postoperatively. Planned duration of the examination is thirty minutes | |
Secondary | Tear film quality | Measurement of tear film quality using Keratograph 5M, OCULUS Optikgeraete GmbH, Wetzlar, Germany | Measurement will take place preoperatively, 7 days and one month postoperatively. Planned duration of the examination is thirty minutes |
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