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In order to determine the intraocular lens to be implanted during cataract surgery, keratometry and axial length must be measured in preoperative. The axial length is obtained by ocular ultrasound mode B. Keratometry is obtained by means of an automatic refractometer or corneal topography. Currently, ultrasound scanners are being developed with a topography module to combine axial length and keratometry measurement. The investigators want to evaluate the corneal topography module of the Zeiss® IOL Master 700 biometer.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Corneal Topography with IOLMaster and Sirius topography. | Experimental | The experimental group will have the two exams: the topography with the IOLMAster and the topography with Sirius topography. |
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| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| measurement of axial length and keratometry by sonographers with a topographic module | Other | measurement of axial length and keratometry by sonographers with a topographic module |
| Measure | Description | Time Frame |
|---|---|---|
| keratometry measurements | to show that the keratometry measurements obtained using the topography module integrated in the IOL Master 700 are consistent with those obtained by a standard topography in patients operated for cataract surgery. The measures will be: K1 (steepest corneal meridian), K2 (flattest corneal meridian), Kmax (central corneal keratometry), the unit of measurement is the diopter. | day 1 |
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| ID | Term |
|---|---|
| D002386 | Cataract |
| ID | Term |
|---|---|
| D007905 | Lens Diseases |
| D005128 | Eye Diseases |
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