Hyabak 0.15% Sodium Hyaluronate Dry Eye Drops. Hyabak Dry Eye drops are suitable for all Dry Eye sufferers looking for an everyday drop, providing long-lasting relief.. Hypo­ton­ic solu­tion restores the nat­ur­al bal­ance of the tear film. Preser­v­a­tive-free. Easy-to-squeeze ABAK® bot­tle – easy to admin­is­ter drops. Handy size, no wastage, economical. Suit­able for reg­u­lar use. Ideal for con­tact lens wearers. 10ml bot­tle has 300 drops per bottle. Unique bot­tle design means it is preser­v­a­tive-free for up to 3 months