(A) Traces showing spontaneous IA(Glu) events from control and ConeSyt1CKO cones held at −70 mV. Frequency: control: 5.8 ± 0.96 Hz, n = 7 cones; ConeSyt1CKO: 6.6 ± 1.09 Hz, n = 9 cones; p=0.62 (t-test). Amplitude: control: 10.8 ± 1.34 pA, n = 7 cones; ConeSyt1CKO: 7.8 ± 0.95 pA, n = 9 cones; p=0.08 (t-test). (B) Traces showing spontaneous IA(Glu) events from control and RodSyt1CKO rods held at −70 mV. Frequency: control: 0.9 ± 0.25 Hz, n = 14 rods; RodSyt1CKO: 5.3 ± 1.25 Hz, n = 6 rods; p=0.004 (Mann-Whitney test). Amplitude: control: 6.6 ± 0.70 pA, n = 14 rods; RodSyt1CKO: 6.4 ± 0.57 pA, n = 6 rods; p=0.87 (t-test). *p=0.004.