“…Within two weeks of optic nerve transection, retinal axons re-invade and branch across the optic tectum Stuermer & Easter, 1984;Rankin & Cook, 1986;Hayes & Meyer, 1988;Schmidt et al, 1988!. Synaptogenesis has been documented within three weeks after optic nerve crush in the goldfish, with subsequent regeneration proceeding across the tectum in an anterior to posterior gradient~Schmidt & Edwards, 1983; Hayes & Meyer, 1989;Meyer & Kageyama, 1999!. There is often an overproduction of optic nerve axons early in regeneration~Schmidt et al, 1988!, and although the retinotopic map is roughly restored by week 5, refinement of the axons and synapses continues for several more weeks~Meyer, 1980;Meyer & Kageyama, 1999;Meyer et al, 1985!. Sunfish are primarily visual predators and feed throughout the day on a wide variety of prey~Mittelbach, 1984; Janssen & Corcoran, 1993!. Sunfish visual projections have been mapped Striedter & Northcutt, 1989;Northcutt & Butler, 1991!, and this family of fishes has served as a model for physiological and behavioral assessment of optic nerve regeneration~Schwassmann & Kruger, 1965;Northmore, 1981, 1991 studies used simple visual tests such as light detection~Northmore, 1989;Northmore & Masino, 1984! or contrast sensitivity~North-more & Celenza, 1992!…”