Euripides calls their walls "heaven-high" (οὐράνια), describes "the Cyclopean foundations" of Mycenae as "fitted snug with red plumbline and mason’s hammer", and calls  Mycenae "O hearth built by the Cyclopes". He calls Argos "the city built by the Cyclopes", refers to "the temples the Cyclopes built" and describes the "fortress of Perseus" as "the work of Cyclopean hands". Callimachus
For the third-century BC poet Callimachus, the Hesiodic Cyclopes Brontes, Steropes and Arges, become assistants at the forge of the smith-god Hephaestus. Callimachus has the Cyclopes make Artemis bow, arrows and quiver, just as they had (apparently) made those of Apollo. Callimachus locates the Cyclopes on the island of Lipari, the largest of the Aeolian Islands in the Tyrrhenian Sea off the northern coast of Sicily, where Artemis finds them "at the anvils of Hephaestus" making a horse-trough for Poseidon:

And the nymphs were affrighted when they saw the terrible monsters like unto the crags of Ossa: all had single eyes beneath their brows, like a shield of fourfold hide for size, glaring terribly from under; and when they heard the din of the anvil echoing loudly, and the great blast of the bellows and the heavy groaning of the Cyclopes themselves. For Aetna cried aloud, and Trinacia cried, the seat of the Sicanians, cried too their neighbour Italy, and Cyrnos therewithal uttered a mighty noise, when they lifted their hammers above their shoulders and smote with rhythmic swing the bronze glowing from the furnace or iron, labouring greatly.
Although ischemic changes may be apparent on the retina, maculopathy may be asymptomatic at first leaving visual acuity unchanged. Central retinal artery occlusion is a known feature of non-proliferative sickle cell retinopathy that has a low incidence in patients with non proliferative sickle cell retinopathy. Optic nerve sign is represented by dilated capillaries that can be visualized in the nerve using fluorescein angiography. Visual acuity often remains unchanged with this finding. Angioid streaks: Angioid streaks may be seen in up to 6% of cases. Proliferative sickle cell retinopathy (PSCR)
Proliferative sickle retinopathy is the most severe ocular complication of sickle cell disease. Even though PSCR begins in the first decade of life, the condition remains asymptomatic and unnoticed until visual symptoms occur due to vitreous hemorrhage or retinal detachment. Goldberg classification
Goldberg classified PSR into following 5 different self-explanatory stages:

Stage of peripheral arterial occlusion and ischemia: It is the earliest abnormality that can be visualized by fundus examination. The occluded arterioles can be seen as dark red lines. They eventually turn into white silver-wire vessels. Stage of peripheral arteriolar-venular anastomoses: Arteriolar-venular anastomoses develop as blood is diverted from blocked arteries to nearby venules. Stage of neovascularization and fibrous proliferation: Neovascularization starts from the arteriolar-venular anastomoses, and grow into the ischemic retina. Characteristic fan-shaped appearance due to neovasularization is known as sea fan neovascularization. Stage of vitreous hemorrhage. Peripheral neovascular tufts bleed and cause vitreous hemorrhage. Stage of vitreoretinal traction bands and tractional retinal detachment: Traction on the sea fan and adjacent retina causes traction retinal detachment.