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EVALUATION OF REFRACTIVE OUTCOMES AFTER IOL IMPLANTATION

IN POST LASIK EYES

D. RAMAMURTHY, R. CHITRA

THE EYE FOUNDATION

COIMBATORE, INDIA.

THE AUTHORS HAVE NO FINANCIAL INTEREST IN THE SUBJECT MATTER OF THIS POSTER

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TO ANALYSE THE REFRACTIVEOUTCOMES AFTER CATARACT SURGERY

IN POST LASIK PATIENTS

OBJECTIVE

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12 EYES OF 10 PATIENTS UNDERWENT CATARACT SURGERY 26 – 90 MONTHS POST LASIK TREATMENT

REFRACTIVE OUTCOME POST CATARACT SURGERY WAS ANALYSED SIX WEEKS AFTER CATARACT SURGERY

MATERIALS & METHODS

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ALL PATIENTS HAD UNDERGONE LASIK IN OUR CENTRE

COMPLETE DATA AVAILABLE

IOL POWER CALCULATED BY

- ASCRS WEBSITE ONLINE CALCULATOR

- HAIGIS – L FORMULA IN IOL MASTER

- B – SCAN IMMERSION BIOMETRY WITH CLINICAL HISTORY

MATERIALS & METHODS

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AS

CR

S W

EB

SIT

E O

NL

INE

CA

LC

UL

AT

OR

S.NO : 9 IN TABULAR COLUMN

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IOL MASTER

S.NO : 9 IN TABULAR COLUMN

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IMMERSION

S.NO : 9 IN TABULAR COLUMN

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CLINICAL HISTORY

REFRACTION

PRE LASIK : – 9.75 DSPH / - 0.75 DCYL X 180°

POST LASIK : PLANO

CORRECTION ACHIEVED : - 10.13 (SPHERICAL EQUIVALENT)

PRE LASIK KERATOMETRY

OD K1 : 45.70 D

K2 : 45.20 D

AVG K : 45.45 D

KERATOMETRY FOR IOL POWER CALCULATION

45.45 -10.13

ACTUAL K FOR IOL POWER CALCULATION : 35.33 D

IOL POWER CALCULATED BY CLINICAL HISTORY : 19D

S.NO : 9 IN TABULAR COLUMN

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S.NOCORRECTION

ACHIEVED BY LASIK

IOL POWER CALCULTEDIOL

POWER POST OP

REFRACTIONIDEAL

POWERCLOSEST

ASCRSHAIGIS -

LCLINICAL HISTORY

1 - 15.50 / -2.75 X 90 +20.83DS +22.50DS +20.0DS +22.0DS -1.0DS (6/18) +21.0DS ASCRS

2 - 11.0 / - 3.50 X 25 +23.67DS +25.0DS +22.50DS +23.50DS PLANO(6/9) SAME ASCRS

3 - 16.0 / -1.0 X 170 +15.08DS +15.0DS +16.0DS +15.0DS+0.50DS/-

2.25*130(6/18)+15.50DS ASCRS

4 -15.5 +13.91DS +12.50DS +16.50DS +14.0DS PLANO(6/18) SAME ASCRS

5 - 13.0 / - 1.75 X 160 +20.89DS +23.0DS +19.50DS +20.50DS PLANO(6/9) SAME ASCRS

6 - 6.0 / - 2.0 X 5 +21.50DS +22.0DS +21.0DS +21.50DS -1.0DS(6/9) +20.50DSCLINICAL HISTORY

7 - 7.25 / - 1.25 X 30 +22.67DS +20.50DS +23.50DS +22.50DS-0.50DS/-

0.50*40(6/6)+22.0DS ASCRS

8 - 8.50 / -1.50 X 10 +20.95DS +19.50DS +21.50DS +21.0DS PLANO(6/6P) SAME ASCRS

9 - 9.75 / - 0.75 X 180 +18.07DS +17.0DS +19.0DS +18.0DS +0.75DS(6/9P) +19.0DSCLINICAL HISTORY

10 - 7.5 / - 0.75 X 160 +19.16DS +19.0DS +19.0DS +18.50DS +0.50DS(6/9) +19.0DS AS/CH/HL

11 - 6.75 / - 1.75 X 180 +22.09DS +21.50DS +21.0DS +21.0DS PLANO(6/9) SAMECLINICAL HISTORY

12 - 5.50 / - 1.0 X 180 +21.57DS +21.50DS +20.0DS +20.50DS PLANO(6/6P) SAMECLINICAL HISTORY

POST LASIK CATARACT OUTCOMES

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EMMETROPIA WAS ACHEIVED IN 6 OUT OF 12 EYES

ALL EYES HAD RESIDUAL ERROR < 1 D SPH

1 EYE HAD RESIDUAL 2.25 D CYL WHICH WAS PREEXISTENT & CANNOT BE ATTRIBUTED TO ERROR IN IOL POWER CALCULATION

ASCRS CALCULATION PREDICTED THE CLOSEST POWER IN 7 EYES

CLINICAL HISTORY PREDICTED CLOSEST IN 4 EYES

ASCRS /CLINICAL HISTORY / HAIGIS L ALL PREDICTED CORRECTLY IN 1 EYE

POST LASIK CATARACT OUTCOMES

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CONCLUSION

IN OUR SERIES

ASCRS ONLINE CALCULATOR PREDICTS IOL POWER MOST ACCURATELY

FOLLOWED BY CLINICAL HISTORY AND LEAST PREDICTABLE WAS HAIGIS – L

VALUES WITH IOL MASTER