[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"health-studies-list:{\"conditionNormalized\":\"anterior-eye-segment-measurements\",\"overallStatus\":[\"RECRUITING\",\"AVAILABLE\",\"NOT_YET_RECRUITING\"],\"orderBy\":\"LastUpdateSubmitDate:desc\",\"size\":25,\"offset\":0}":3,"health-study-condition:anterior-eye-segment-measurements":28},{"pageToken":4,"total":5,"offset":6,"count":5,"results":7},null,1,0,[8],{"id":9,"slug":10,"hasResults":11,"nctId":12,"briefTitle":13,"officialTitle":14,"acronym":4,"eligibilityCriteria":15,"healthyVolunteers":16,"sex":17,"minAge":18,"maxAge":19,"enrollmentInfo":20,"targetDuration":4,"studyType":23,"phases":4,"briefSummary":24,"conditions":25,"keywords":29,"overallStatus":36,"whyStopped":4,"lastUpdateSubmitDate":37,"lastUpdatePostDateStruct":38,"startDateStruct":41,"completionDateStruct":43,"leadSponsor":45,"locationsCount":5},"100638628","acute-ocular-effects-of-cigarette-smoking-100638628",false,"NCT07580040","Acute Ocular Effects of Cigarette Smoking","Acute Effects of Cigarette Smoking on Corneal Tomographic and Biometric Parameters: A Prospective Controlled Study","Inclusion Criteria:\n\n* Healthy adults aged 18 to 60 years\n* Current smokers in the smoking group\n* Never-smokers in the control group\n* Willing and able to undergo ophthalmic examination and Pentacam AXL measurements\n\nExclusion Criteria:\n\n* History of ocular surgery or ocular trauma\n* Presence of corneal disease, retinal disease, or ocular surface disorder\n* Clinically significant dry eye disease\n* Contact lens use within the last 2 weeks\n* Use of medications that may affect the ocular surface or pupillary dynamics, including anticholinergics or sympathomimetics\n* Systemic diseases such as diabetes mellitus or hypertension\n* Former smoking history in the control group\n* Use of electronic cigarettes or other tobacco products\n* Inability to cooperate adequately for accurate measurement",true,"ALL","18 Years","60 Years",{"count":21,"type":22},90,"ESTIMATED","OBSERVATIONAL","This prospective study aims to evaluate the short-term effects of smoking on corneal tomographic and biometric measurements in healthy adults. After baseline examinations and measurements are taken in both smoking and non-smoking participants, the same measurements will be repeated after 10 minutes of external exposure, and within-group and between-group changes will be compared. The aim of the study is to determine whether acute smoking exposure leads to measurable immediate changes in corneal tomographic and biometric parameters.",[26,27,28],"Smoking ( Cigarette)","Cornea","Anterior Eye Segment Measurements",[30,31,32,33,34,35],"Cigarette Smoking","Corneal Tomography","Biometry","Pentacam","Anterior Segment","Corneal Densitometry","RECRUITING","2026-05-05",{"date":39,"type":40},"2026-05-12","ACTUAL",{"date":42,"type":40},"2026-02-15",{"date":44,"type":22},"2026-05",{"name":46,"class":47},"Istanbul University","OTHER"]