Comparison of the amount of aqueous flare between laser photometry and subjective evaluation techniques in dogs undergoing phacoemulsification
Abstract
This study aimed to compare the quantification of aqueous flares using laser photometry and
subjective clinical determination after phacoemulsification through the V-prechop nucleodissection
technique in dogs. Forty-three dogs of different breeds, males and females, aged 3–10 years, with
mature (G2, n = 22) and immature (G1, n = 21) cataracts, were included. After surgery, the patients
were evaluated weekly for aqueous flares (using laser flare photometry) and clinically evaluated using
slit-lamp biomicroscopy over different periods. Intraocular inflammation was more evident in patients
with stage G2 disease than in those with stage G1 disease. Over time, it regressed in most animals,
persisting to a mild degree in three animals by the end of the observation period. Statistical analyses
revealed key differences between the groups in the immediate postoperative period and after 30
days of observation. “Aqueous flare” (ph/ms), quantified using laser flare photometry, was higher
in the operated eyes of both groups (G1 and G2). However, a significant difference was observed
in the immediate postoperative period and at 45 and 30 days in groups G1 and G2, respectively.
Furthermore, when comparing the operated eyes of each group, a significant difference was observed
in the preoperative period and 60 days postoperatively; the mean values were always higher in the G2
patients (G1-preop = 25.5 ± 11.4 ph/ms and G2-preop = 45.7 ± 17.7 ph/ms; G1-60d = 23.4 ± 8.9 ph/ms
and G2-60d = 39.8 ± 13.4 ph/ms). In conclusion, laser cell and flare photometry showed higher accuracy
in evaluating aqueous flares than clinical evaluation based on scores during the postoperative period
in phacoemulsification by V-prechop nucleodissection. The quantitative values of flares obtained
using this non-invasive method may also be used to evaluate other nucleodissection techniques in
phacoemulsification.
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