Visual Quality and Contrast Sensitivity Function for Limbal Dermoid Children After Corneal Transplantation

Study Overview
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Brief Summary
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This study is to inquiry the contrast sensitivity function in the 50 eyes of limbal dermoid children with keratoplasty with quick contrast sensitivity function (quick CSF) test, as well asa to analyze its relationship between visual quality.

Detailed Description
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Limbal dermoid(LD) is a congenital benign tumor that consist of overgrowths of epidermal appendages that influence vision and cause visual abnormalities due to the induced corneal astigmatism. A large proportion of patients, all of whom had epibular dermoids, has amblyopia. In a previous study, keratoplasty, such as LKP (Lamellar Keratoplasty) or PKP (Penetrating Keratoplasty), was shown to facilitate the reconstruction of appearance, and improve visual acuity significantly postoperatively. However, the reestablishment of visual acuity and visual function are always ignored by parents after visual appearance recovery. Several studies have evaluated the visual acuity and objective and subjective visual function of patients after keratoplasty. These outcomes include contrast sensitivity (CS), refractive error, graft clarity, anterior and posterior corneal higher order aberration, and vision-related quality of life. Although a subjective visual function assessment has been deemed critical, postkeratoplasty patients with vision complaints are not uncommon despite clear grafts and relatively good visual acuity, and the visual function evaluation for LD were relatively less. 50 eyes of 50 limbal dermoid children with corneal transplantation more than 1 year were included in this study. All participants underwent an ophthalmic examination that included slit-lamp biomicroscopy, visual acuity, quick CSF under full optical correction, 9-SF life quality questionnaire and fundus examination. Then the normal group would be covered by the positive spherical lens of 1.0D to 6.0D to repress the BCVA to 0.1 to 0.9 respectively to compare the visual functions with the keratoplasty patients on the same visual acuity.

Official Title
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Zhongshan Ophthalmic Center, Sun Yat-Sen University,China

Conditions
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Limbal Dermoid

Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Accept the corneal transplantation based on the clinical diagnosis of ocular surface disease; more than 7 and less than 60 years old; absence of other ocular disorders and no history of eye surgery and other systemic diseases. Exclusion Criteria: less than 7 or more than 60 years old; with the history of eye surgery and other systemic diseases.

Ages Eligible for Study
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Minimum Age: 7 Years
Maximum Age: 60 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| the keratoplasty group<br>Patients with limbal dermoid who accepted cornea transplantation surgery after 1 year were performed quick CSF from Adaptive Sensory Technology company | |
| the normal group<br>normal children without ocular disease | |

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| The contrast sensitivity function tested by quick CSF in the keratoplasty group | The quick CSF (contrast sensitivity function) tests including AULCSF (the area under the log CSF) and Cutoff SF (Cutoff sensitivity function) | on 1 year postkeratoplasty | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Keratopathy, Visual Quality, Contrast Sensitivity Function