Corneal biomechanical properties and intraocular pressure changes after phacoemulsification and intraocular lens implantation.
OBJECTIVE
To evaluate corneal viscoelastic and intraocular pressure (IOP) changes measured by an ocular response analyzer (ORA) after phacoemulsification and intraocular lens (IOL) implantation.


METHODS
Yeditepe University Department of Ophthalmology, Istanbul, Turkey.


METHODS
Fifty-one eyes scheduled for cataract surgery were included in the study. Corneal hysteresis (CH), corneal resistance factor (CRF), corneal-compensated intraocular pressure (IOPcc), and Goldmann-correlated IOP (IOPg) were measured by ORA preoperatively and 1 week and 1 and 3 months postoperatively. Central corneal thickness (CCT) was measured using the ORA's integrated handheld ultrasonic pachymeter.


RESULTS
The mean preoperative CCT (537 microm+/-46 [SD]) did not change significantly by the end of 1 month postoperatively. The mean preoperative IOPcc (17.2+/-3.0 mm Hg) decreased significantly by 3 months postoperatively (15.2+/-3.7 mm Hg) (P= .018). The mean CH decreased from 10.36+/-1.48 mm Hg preoperatively to 9.64+/-1.26 mm Hg at 1 week (P= .028); it increased to preoperative values at the end of 1 month (10.20+/-1.70) and 3 months (10.74+/-1.54) (P>.05). The mean CRF decreased from 10.94+/-2.54 mm Hg preoperatively to 9.99+/-1.77 at 1 week (P= .026); it increased to preoperative values at 1 month (10.26+/-1.59) and 3 months (10.35+/-1.46) (P>.05).


CONCLUSIONS
Although CH and the CRF decreased in the early postoperative period, the parameters increased and reached preoperative values by 3 months postoperatively, showing that corneal biomechanical properties are influenced by phacoemulsification and IOL implantation.
Kucumen
Raciha Beril
RB
Department of Ophthalmology, Yeditepe University Eye Hospital, Istanbul, Turkey. berilkucumen@hotmail.com
Yenerel
Nursal Melda
NM
Gorgun
Ebru
E
Kulacoglu
Destan Nil
DN
Oncel
Banu
B
Kohen
Maryo Cenk
MC
Alimgil
Murat Levent
ML
D001696:Biomechanical Phenomena / Q000502:physiology; D003315:Cornea / Q000502:physiology*; D004548:Elasticity / Q000502:physiology*; D005500:Follow-Up Studies; D006801:Humans; D007429:Intraocular Pressure / Q000502:physiology*; D019654:Lens Implantation, Intraocular; D018918:Phacoemulsification; D011184:Postoperative Period; D011446:Prospective Studies; D014065:Tonometry, Ocular