eye strain 
noun [mass noun]
Fatigue of the eyes, such as that caused by reading or looking at a computer screen for too long: avoid eye strain and have your sight checked regularly...
- Why do some computer work-stations confer eye strain and muscle fatigue?
- Side effects include eye strain, headache, fatigue, irritability and inability to sleep.
- A recent study has found that concentrating on difficult off-screen objects, such as the faces of loved ones, causes eye strain in computer scientists.
- ring splice
- ringspot
- ring-spotted
- ring-stand
- ring staple
- ringster
- ring-stopper
- ring-straked
- ring-streaked
- ring system
- ringtail
- ringtail cat
- ring-tailed
- ring-tailed cat
- ring-tailed lemur
- ring-tailed marlin
- ring-tailed pigeon
- ring-tailed possum
- ringtail opossum
- ring taw
- ring the changes
- ring theory
- ring time
- ringtone
- ringtoss