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This abstract is assigned to session BSCRS: Belgian Societies of Cataract and Refractive Surgery

Title

PREDICTING CATARACT SURGERY RESULTS USING A MACULAR FUNCTION TEST

Purpose	To assess the predictive value of a macular function test in the preoperative evaluation of cataract patients.
Methods	Prospective study of 396 uneventful consecutive cataract procedures performed by 1 surgeon from September 2000 to February 2001. The Best corrected visual acuity (BCVA) and the density and location of lens opacities were recorded preoperatively. Macular function was assessed pre-operatively using a Parinaud test at 12 cm with a hyper-addition of + 8.0 diopters and extra-illumination. The postoperative BCVA was compared with the results of the macular function test.
Results	Of the 359 eyes (90.7%) that could read the Parinaud 1 line on the preoperative hyper-addition test, 338 (94.2 %) attained a final BCVA of 20/25 or better and 356 (99.2%) of 20/30 or better. Twenty-five eyes that could not read Parinaud 1 preoperatively and presented with a dense nuclear or posterior subcapsular cataract also achieved a BCVA of 20/25 or better. Three eyes could read Parinaud 1 preoperatively but did not attain a BCVA od 20/30 or better postoperatively. 2 of the eyes had macular oedema and 1 an opaque posterior capsule.
Conclusion	The results of this study suggest that this simple macular function test has a positive predictive value of 94.2% in predicting a visual outcome of 20/25 or better after cataract surgery. The sensitivity was 94.2 % and the specificity, 32.4 %. The negative predictive value is 32.4% and the positive predictive value for a BCVA of 20/30 or better, 99.2%.

Author 1

Last name	VRYGHEM
Initials	J C
Department	Clinique St-Jean
City	Brussels

Author 2

Last name	VAN CLEYNENBREUGEL
Initials	H
Department	Oogziekenhuis
City	Rotterdam