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| Name | Class |
|---|---|
| Palacky University | OTHER |
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Strip meniscometry is a relatively new method for evaluating the tear meniscus. The aim of the study is to evaluate the possible effect of cataract surgery on ocular surface disease and to assess the possible benefit of strip meniscometry in the preoperative and postoperative evaluation of patients.
Cataract surgery is one of the most successful anterior segment surgeries and usually results in excellent postoperative visual acuity. However, some patients may experience symptoms of dry eye disease after a successful procedure, most commonly a foreign body sensation in the eye, intermittent pain, and blurred vision. These problems then interfere with normal daily activities and also reduce the patient's satisfaction with the surgery.
The new method for tear film examination Strip meniscometry (SM) appears to be a suitable alternative to the Schirmer test. SM values correlate with Oxford score (fluorescein staining), tear break up time test or measurement of meniscus height using anterior segment optical coherence tomography. It is a minimally invasive and rapid examination method that measures the volume of the aqueous component of the tear film.
The aim of this study is to evaluate the possible influence of cataract surgery on the development of iatrogenic OSD and to assess the contribution of a new diagnostic method, SM, for the evaluation of OSD before and after cataract surgery.
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| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Central visual acuity | Diagnostic Test | Measurement of central visual acuity using Snellen optotype chart. | ||
| Intraocular pressure measurement | Diagnostic Test | Measurement of intraocular pressure using non-contact Canon TX-20P tonometer. | ||
| Slit lamp examination | Diagnostic Test | Slit lamp examination of the anterior and posterior segment of the eye after pharmacological dilation of the pupil using application of short-time mydriatics (1% tropicamide and 10% phenylephrine). | ||
| Refraction and keratometry | Diagnostic Test | Measurement of refraction and keratometry using refractometer Nidek ARK-1a. | ||
| Optical biometry | Diagnostic Test | Measurement of optical biometry using biometer Argos (Barrett or SRK/T formula). |
| Measure | Description | Time Frame |
|---|---|---|
| Change in strip meniscometry. | Strip Meniscometry Tube in millimeters. | Week 1, 4, 12 |
| Measure | Description | Time Frame |
|---|---|---|
| Change in ocular surface fluorescein staining. | Oxford scheme grading with range from 0 (none staining dots) to 5 (severe dry eye). | Week 1, 4, 12 |
| Change in tear film stability. | Tear break up time test in seconds. |
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Inclusion Criteria:
Exclusion Criteria:
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Group will be recruited from patients who undergo cataract surgery at the Department of Ophthalmology of University Hospital Olomouc and Palacky University.
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| Name | Affiliation | Role |
|---|---|---|
| Marta Karhanova, MD, PhD | University Hospital Olomouc and Palacky University Olomouc | Principal Investigator |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Department of Ophthalmology, University Hospital Olomouc | Olomouc | Czechia |
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| Strip meniscometry (SM) | Diagnostic Test | Strip meniscometry examination using strip meniscometry tube. |
| Lid Parallel Conjunctival Folds test (LIPCOF) | Diagnostic Test | Evaluation of lid parallel conjunctival folds using slit lamp examination. |
| Staining of the ocular surface with fluorescein | Diagnostic Test | Evaluation of ocular surface fluorescein staining using Oxford scheme. |
| Tear break up time test (TBUT) | Diagnostic Test | Evaluation of tear break up time using slit lamp examination. |
| Ocular Surface Disease Index questionnaire (OSDI) | Other | Evaluation of Ocular Surface Disease Index using Ocular Surface Disease Index questionnaire. |
| Week 1, 4, 12 |
| Change in lid-parallel conjunctival folds evaluation. | Lid-parallel conjunctival folds (LIPCOF) grading from 0 (no conjunctival folds) to 3 (more than two permanent and clear parallel folds (normally higher than 0.2 mm). | Week 1, 4, 12 |
| Change in Ocular Surface Disease Index. | Ocular Surface Disease Index (OSDI) questionnaire with range from 0 to 100 (higher score represents greater disability). | Week 1, 4, 12 |
| ID | Term |
|---|---|
| D015352 | Dry Eye Syndromes |
| ID | Term |
|---|---|
| D007766 | Lacrimal Apparatus Diseases |
| D005128 | Eye Diseases |
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| ID | Term |
|---|---|
| D014065 | Tonometry, Ocular |
| D000072776 | Slit Lamp Microscopy |
| D012029 | Refraction, Ocular |
| ID | Term |
|---|---|
| D003941 | Diagnostic Techniques, Ophthalmological |
| D019937 | Diagnostic Techniques and Procedures |
| D003933 | Diagnosis |
| D014787 | Vision Tests |
| D055620 | Optical Phenomena |
| D055585 | Physical Phenomena |
| D009799 | Ocular Physiological Phenomena |
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