| Batteries in optical mice |
| Insect's sensory appendage |
| Optical products pioneer |
| Sensory stimulus |
| Sensory input |
| Sensory organ on a snail's stalk |
| Subtle sensory stimuli |
| Insect's sensory organs |
| Optical tiredness |
| Unit of optical power of a lens |
| Sensory organs |
| Akimbo optically |
| Sensors |
| Insect's sensory device |
| A sensor |
| Sensory organ an eavesdropper uses |
| Optical inflammation |
| Optical solution |
| Adjective in optical navigation |
| Optical openings |
| 'Which is longer, --?' (optical illusion question) |
| Sensory stimuli |
| Clone of an optical medium's contents |
| Grid in the eyepiece of an optical instrument |
| Sprite's sensors? |
| Insect's sensory thing |
| Sensory organelles in a cell |
| Sensory omen regarding money |
| Console with a Kinect motion sensor |
| Sensor |