opticallyadv.

1593 R. Harvey Philadelphus 21 Brute presently upon his Arriual searched this Iland optically and throughly.

1656 tr. J. A. Comenius Latinæ Linguæ Janua Reserata: Gate Lat. Tongue Unlocked lii. §528 They measure distances optically, by visible lines, with the help of a Quadrant.

1816 Philos. Trans. (Royal Soc.) 106 74 The two pieces AB, BD, though they touch one another optically, are not in physical contact.

1849 M. Somerville On Connexion Physical Sci. (ed. 8) xxxvii. 421 Aldebaran, α Aquilæ, and Pollux are remarkable instances of these optically double stars.

1879 J. Tyndall Fragm. Sci. (ed. 6) II. xiii. 304 The air..was proved by the luminous beam to be optically pure.

1933 A. S. Eddington Expanding Universe iii. 109 Such an image might optically be mistaken for a substantial body.

1967 Films in Rev. Mar. 179/2 The best monster sequence is created..by the original version's technique of optically blowing up an iguana to giant size.

1994 J. F. Garner Politically Correct Bedtime Stories 3 Oh, I forgot you are as optically challenged as a bat.

1858 H. Watts & R. Bridges Graham's Elem. Inorg. Chem. (ed. 2) Suppl. 666 The preceding method may be directly applied to determine the strength of a solution of any optically active substance.

1919 S. B. Schryver Study Biol. Chem. v. 199 All the native monosaccharoses are optically active.

1999 I. Kostov & R. I. Kostov Crystal Habits Minerals vi. 180 On cubic crystals, optically active solutions may form etch figures with gyroidal symmetry.