The analysis of predicted capsular bag diameter using modified model of capsule measuring ring in Asians.
BACKGROUND
This study measured the capsular bag diameter (CBD) of Asian eyes using a modified capsular measuring ring (CMR) after cataract surgery, and identified preoperative predictive factors for postoperative CBD and the change of capsular bag diameter after surgery.


METHODS
This prospective study followed 25 eyes undergoing cataract surgery inserted with a CMR before intraocular lens (IOL) implantation at the Department of Ophthalmology, Ilsan Paik Hospital, Inje University, Republic of Korea. Axial length (AL), anterior chamber depth (ACD), lens thickness, corneal power and corneal size were measured preoperatively. CBD was calculated using the CMR in a dilated state at postoperative 1 day, 1 week, 1 month, 2 months, and 1 year.


RESULTS
AL (R = 0.713) and ACD (R = 0.402) were found to positively correlate with CBD at postoperative 1 week. AL (P < 0.001) and ACD (P = 0.046) were found to be predictors of CBD. The mean CBD gradually decreased to 11.30 +/- 1.76 mm at 1 day, 10.86 +/- 1.06 mm at 1 week, 10.23 +/- 1.43 mm at 1 month, 9.88 +/- 1.31 mm at 2 months, and 9.85 +/- 1.43 mm at 1 year.


CONCLUSIONS
CBD size could be determined using a CMR implanted during surgery. AL and ACD were predictors of postoperative CBD. Predicting CBD in this way may assist in selecting appropriately sized IOL, which will lead to improved visual quality after cataract surgery.
Kim
Jin-Hyoung
JH
Department of Ophthalmology, Ilsan Paik Hospital, Inje University, Koyang, Korea.
Lee
Doh
D
Cha
Young-Dong
YD
Oh
Sae-Hoon
SH
Mah
Ki-Choong
KC
Lee
Moo-Suk
MS
D000368:Aged; D000369:Aged, 80 and over; D000867:Anterior Chamber / Q000473:pathology; D044466:Asian People; D002386:Cataract / Q000473:pathology / Q000503:physiopathology; D002387:Cataract Extraction; D003315:Cornea / Q000473:pathology / Q000503:physiopathology; D003941:Diagnostic Techniques, Ophthalmological / Q000295:instrumentation*; D005260:Female; D006801:Humans; D007903:Lens Capsule, Crystalline / Q000473:pathology* / Q000601:surgery*; D007908:Lens, Crystalline / Q000473:pathology; D008297:Male; D008875:Middle Aged; D011184:Postoperative Period; D011237:Predictive Value of Tests; D011300:Preoperative Care; D011446:Prospective Studies; D013997:Time Factors