Length (μm) of outer segments of human photoreceptors

CONES

Study
M & L cones foveola
M & L cones foveal slope (macula)
M & L cones parafoveal
M & L cones mid-peripheral (4 mm eccentic)
M & L cones periphery
S cones fovea
S cones periphery (>5 mm or 17 deg)
Notes
Schultze (1866,1872)
36
--
--
--
--
--
--
--
Greeff (1900,1902)
38
22
--
--
6.5-13
--
--
--

Polyak (1941)

35
--
--
--
--
--
--
--
Yamada (1969)
>45
--
--
--
--
--
--
--
Yodelis & Hendrickson (1986)
41-50
25-31
37 year old man
57-63
33-45
72 year old man
Ahnelt (personal comm.)
--
--
--
--
--
31-42
12-17
Hendrickson & Drucker (1992)
--
--
28
20-23

RODS

Study
Rods periphery
Rods mid-peripheral (4 mm eccentic))
M & L cones parafoveal
Greeff (1900,1902)
25
--
--
Hendrickson & Drucker (1992)
--
40-45
40

Tables compiled by Ted Sharpe.


References

von Greeff, R. (1900). Mikroskopische Anatomie des Sehnerven und der Netzhaut. In: Graefe u. Saemisch Handbuch d. Ges. Augenheilkunde, 2. Aufl., 1. Teil, bd 1, Kap. V.

von Greeff, R. (1902). A guide to the microsopic examination of the eye. Philadelphia: Blackiston.

Hendrickson, A. & Drucker, D. (1992). The development of parafoveal and mid-peripheral human retina. Behavioural Brain Research 49, 21-31.

Polyak, S.L. (1941). The retina. Chicago: University Press.

Schultze, M. (1866). Zur Anatomie und Physiologie der Retina. Archiv für Mikroskopische Anatomie 2, 175-286.

Schultze, M. (1872). The eye: the retina. In: Manual of human and comparative histology (ed., Stricker, S.) 3, 213. The Sydenham Society, London.

Yamada, E. (1969). Some structural features of the fovea centralis of the human retina. Archs. Ophthalmol. 82, 151-159.

Yuodelis, C. & Hendrickson, A.E. (1986). A qualitative and quantitative analysis of the human fovea during development. Vision Research 26, 847-856.