Transcript Comparison of surgically induced astigmatism after

Comparison of surgically induced
astigmatism after phacoemulsification
trough 3.2, 2.2 and 1.8 clear corneal incision.
The authors have no financial interest in the subject matter
of this e-poster
Luis Izquierdo Jr MD. PhD.
Maria Alejandra Henriquez MD.
Amapola Rey Sanchez MD.
Purpose
• To compare surgically induced astigmatism (SIA) after
phacoemulsification trough clear cornea of 1.8 mm, 2.2
mm and 2.8 mm.
Methods
• This prospective, randomized and comparative study included 72 eyes of
72 patients that were divided into 3 groups according the size of the clear
cornea incision (3.2 mm, 2.8 mm and 2.2 mm).
• The intraocular lens (IOLs) implanted were Tecnis (ZA9003,
AMO),Tecnis ( ZCBOO, AMO) and IQ (SN60WF de Alcon).
• Pre and postoperative (1 months) uncorrected and bestcorrected visual
acuity (UCVA, BCVA), spherical equivalent (SE) and topography was
recorded and compared.
• The SIA was calculated with a software, the statistically analysis was
performed by Mann Whitney test.
RESULTS
• There were statistically significant difference between the
3.2 and 2.8 mm group (p = 0.002) and the 3.2 versus the
2.2 mm group (p = 0.001).
• The postoperative UCVA in the 3.2, 2.8 and 2.2 mm
group were 0.10, 0.20, 0.30 logMAR respectively.
• The postoperative SE for the 3.2, 2.8 and 2.2 mm were 0.13, -0.26, y -0.25 respectively (p > 0.05 for all the
comparison groups).
1.09
Diopters
0.77
0.39
Incision size
Uncorrected visual acuity comparing the 3 groups
Preoperative UCVA (LogMAR)
LogMarAVSCpre
LogMarAVSCpos
Postoperative UCVA (LogMAR)
2,0
LogMar
1,5
1,0
0,5
0,0
A(3.2)
B(2.8)
C(2.2)
Incisión
There were statistically significant difference between the 3 groups (p= 0.003)
Induced astigmatism comparing the 3 groups
10,00
39
Astigmatismo_inducida
8,00
3
6,00
SIA:1.09
4,00
2,00
SIA:0.77
SIA:0.39
0,00
A(3.2)
B(2.8)
Incisión
C(2.2)
CONCLUSIONS
• The cataract surgery trough 2.2 mm clear cornea incision
showed the best visual improvement and the smallest
SIA.
REFERENCES
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Luis Izquierdo Jr.
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Opthalmology Residency, Escola Paulista de Medicina , Brasil.
Fellow in Cornea. UC Davis. CA. USA
Master in Ophthalmology. USMP. Lima Peru.
PhD in Medicine. USMP Lima Peru.
Professor of Oftalmology of Universidad de San Marco. Lima Peru.
Medical Director of OFTALMOSALUD Institute of eyes. Lima- Peru.