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. 2020 Oct 7;61(12):5. doi: 10.1167/iovs.61.12.5

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Figure 4. — SR–LR connection consists of a thin tendon connecting the SR with the common tendon of the three rectus muscles in a fetus with a CRL of 264 mm. (A) The most superior site and (H) the most inferior site. (A) The SR originates from the sphenoid (black star). (H) The LR, IR, and MR have a common origin (open star). (A) An additional head of the LR originates from the lateral margin of the SR (arrows). (C, D, and E) The abducent and oculomotor nerves (ABN, OCN) pass between the major and additional heads of the LR. (C, D, and G) A thin tendon (arrowheads; surrounded by green line) extends from the inferolateral end of the SR origin (C), via the medial side of the OCN (D), to a superior margin of the common tendon (G). All images were prepared at the same magnification (scale bar in A, 1 mm; ×1 objective). CG, ciliary ganglion; ON, optic nerve; OPA, ophthalmic artery.