الفهرس 
INTRODUCTIONOnly 14 pages are availabe for public view
Abstract
Measurement of anterior chamber depth become increasingly important in ophthalmic practice, for instance, when it comes to planning cataract and calculating phakic or pseudophakic intraocular lens (IOL) power and diameter. Intraocular lens (IOL) implantation surgery has been developed extensively, and accurate evaluation of the anterior chamber depth (ACD; the distance from the anterior surface of the cornea to the anterior surface of the lens) is becoming increasingly critical, which can be used in the IOL power calculation formulas.
Accurate measure of ACD can reduce postoperative complications. ACD can be measured by both contact and non – contact methods. Pentacam and IOLmaster are both non – contact instruments, which are becoming increasingly popular because of their speed of operation, relative ease of use, avoidance of any need for topical anesthesia and lack of corneal indentation.
The Pentacam uses a rotating Scheimpflug camera to provide images acquired, information on ACD, keratometry readings, corneal thickness, and the horizontal corneal diameter can be determined. The IOL master can also provide anterior segment measurements.
We tried to compare anterior chamber depth measurements obtained using pentacam , A scan and IOL master to evaluate the difference in both methods. The present study was conducted on 100 studied cases. All cases were subjected to detailed history, detailed ophthalmological examination, best corrected visual acuity, slit lamp examination of anterior segment, biomicroscopic fundus examination using auxiliary lens, intraocular pressure and measurement of anterior chamber by Pentacam for corneal topographyand IOL master for biometry. The patients were 54% males and 46% females out of 100 studied eyes.
In our study, ACD increased after surgery measured by IOL master and pentacam. Mean axial length did not differ significantly after cataract surgery measured by Iol master and A scan.
The results showed ACD measured by IOL master and pentacam methods; mean of differences between methods was 0.44 mm.
ACD increased after surgery measured by IOL master, A scan, pentacam (p<0.001 for each). Mean preoperative ACD by IOL master, pentacam and A scan 3.3-2.9-3.1mm respectively. Mean postoperative ACD by IOL master, pentacam and A scan 3.6- 3.3- 3.3mm respectively.