The purpose of the study is to observe lacrimal fluid condition (tear film break-up time) chronologically after a single dose of AL-43546 ophthalmic products（0.15%, 0.25% and vehicle）and 0.1% sodium hyaluronate ophthalmic solution and compare lacrimal fluid retention time between them.

Inclusion Criteria:

• Subjects with NIBUT of either eye is 8 seconds or less and other eye is 10 seconds or less at screening test and NIBUT of either eye before instillation in Period I is 10 seconds or less.

Exclusion Criteria:

• Diagnosis of severe Sjogren's syndrome (history of the use of punctal plug one time or more, etc.) in either eye.
• Subjects who will use ophthalmic solutions (excluding the specified artificial tear) or ophthalmic ointment in either eye during the study period.