Effect of retrobulbar injection of lidocaine on saccadic velocities.
OBJECTIVE
To determine whether exposing the extraocular muscles (EOMs) to lidocaine via retrobulbar injection for cataract surgery has a demonstrable negative effect on subsequent function of the muscle.


METHODS
York Finch Eye Associates, Humber River Regional Hospital, and Toronto Western Hospital Research Institute, Toronto, Ontario, Canada.


METHODS
This study comprised 37 eyes that had phacoemulsification and posterior chamber intraocular lens implantation; 13 eyes had retrobulbar lidocaine with hyaluronidase and 24 eyes, topical anesthesia. The postoperative saccadic velocities were compared with the preoperative velocities using a sensitive recording device. The results were compared within and between the retrobulbar lidocaine and topical anesthesia groups.


RESULTS
No detectable decrement in postoperative saccadic velocities was detected in any patient, and no difference was found between the groups.


CONCLUSIONS
Exposing EOMs to lidocaine for cataract surgery had no detectable negative effect on saccadic velocities 1 week after surgery.
Irving
Elizabeth L
EL
Department of Ophthalmology, University of Toronto, Ontario, Canada.
Arshinoff
Steve A
SA
Samis
William
W
Lillakas
Linda
L
Lui
Byron
B
Laporte
Janet Taylor
JT
Steinbach
Martin J
MJ
D000368:Aged; D000369:Aged, 80 and over; D000772:Anesthesia, Local / Q000379:methods; D000779:Anesthetics, Local / Q000008:administration & dosage*; D005260:Female; D006801:Humans; D006821:Hyaluronoglucosaminidase / Q000008:administration & dosage; D007267:Injections; D019654:Lens Implantation, Intraocular; D008012:Lidocaine / Q000008:administration & dosage*; D008297:Male; D008875:Middle Aged; D009801:Oculomotor Muscles / Q000187:drug effects*; D009915:Orbit; D018918:Phacoemulsification; D012438:Saccades / Q000502:physiology*
D000779:Anesthetics, Local; D008012:Lidocaine; D006821:Hyaluronoglucosaminidase