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Evaluation of customised tip exposure for a safe and effective vertical chop in various grades of cataract using a calibrated phacotip

Session Details

Session Title: Phaco Techniques

Session Date/Time: Saturday 05/10/2013 | 08:30-10:30

Paper Time: 09:56

Venue: Main Lecture Hall (Ground Floor)

First Author: : V.Vohra INDIA

Co Author(s): :    P. Malik   T. Dewan   M. Gupta        

Abstract Details


To evaluate safety and effectiveness of calibrated phacotip (SRF CMP2) at varying amounts of phacotip exposure and penetration, in increasing grades of nuclear cataract for achieving a safe and effective vertical chop by comparing incisional fluid loss and endothelial cell count.


Department Of Ophthalmology ,Dr.RML Hospital And PGIMER, New Delhi, India


This is an observational comparative study based on the normogram suggested by prior study conducted using SRF CMP1 phacotip , showing correlation between phacodepth and grades of cataract while executing vertical chop. We enrolled 195 patients awaiting cataract surgery in 3 groups according to LOCS III grading; Group A (0.1-3.9), Group B(4.-5.5) and Group C(5.6-6.9) . During phacoemulsification, sleeve position on the specially designed calibrated phaco tip SRF CMP2 was kept as 2.4mm (group A), 2.6mm(group B) and 2.8mm (group C). Outcome variables compared between the 3 groups were: achievement of effective vertical chop, incisional fluid loss, incidence of posterior capsular rent and one month endothelial cell count.


The study population had a mean age of 60.85 ± 0.512 years. A successful vertical chop was achieved in all cases. Average incisional fluid loss seen in group A was 24.10 ± 0.93mL, group B was 24.62 ± 0.90mL and group C was 25.34 ± 0.96 mL. However no statistically significant difference in incisional fluid loss was noted between the three groups (p =0 .643) at higher sleeve position in increasing grades of cataracts. Also no significant difference was seen in the endothelial cell count of the three groups at 1 month (p=0.444), nor did the incidence of posterior capsular rent rise amongst the 3 groups.


Using a calibrated phacotip ( SRF CMP2) for phacotip penetration, titrated according to nuclear hardness, doesn’t significantly affect the incisional fluid loss , endothelial cell count and incidence of posterior capsular rent thus making vertical phacochop more safe and effective.

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