Vol. 5 Issue 2 Part A

Purpose: The aim of our work is to compare between B Scan Ultrasonography, Immersion UBM and Contact UBM Techniques In evaluation of the Lens Area.

Methods: A prospective observational case series study was performed on thirty eyes for patients suffering from lens pathology examined by B Scan Ultrasonography, Immersion UBM and Contact UBM at the Ophthalmology Department in Tanta University Hospitals from January 2021 till June 2021 and performed by Sonomed Escalon ophthalmic ultrasound Vupad, U.S.A.

Results: The mean age was 59.67±5.80 with peak incidence between the ages of 60 to 69 years. 43.3% cases were males and 56.7% cases were females. The mean value of the depth of the anterior chamber by immersion UBM and contact UBM was 2.565±0.292 mm (range from 2.11 mm to 3.04 mm) and 2.183±0.457 mm (range from 1.52 mm to 2.99 mm) respectively and underestimated by contact UBM with statistically significant difference between the values that measured by the two methods (p value <0.001). The mean value of the anterior chamber angle by immersion UBM and contact UBM was 26.30 °±9.61° (range from 0° to 40.7°) and 22.41°±7.95° (range from 0° to 34.8°) respectively and underestimated by contact UBM with statistically significant difference between the values that measured by the two methods (p value <0.001).

Conclusion: Anterior chamber depth and angle are shallower and narrower respectively by contact UBM rather than immersion UBM. Contact UBM is an alternative to immersion UBM in general with more comfortability for patient and confidently about safety for physician but especially with recent repaired ocular wounds or surgeries and irregular ocular surface such as anterior staphyloma or severe corneal ectasia.