This study included patients who visit for refractive surgery (photorefractive keratectomy, photorefractive keratectomy with with corneal collagen cross linking, laser in situ keratomileusis, small incision lenticule extraction), phakic Intraocular Lens implantation (Implantable Collamer Lens, artiflex), and cataract surgery. Patients will be examined whether iris recognition scanner of smartphone works before and after surgery. In addition, before and after pupil dilation (5mm, 6mm, 7mm, 8mm), patients will be examined whether iris recognition scanner of smartphone works well.

Inclusion Criteria:

• Patients who visit for refractive surgery (photorefractive keratectomy, photorefractive keratectomy with with corneal collagen cross linking, laser in situ keratomileusis, small incision lenticule extraction)
• phakic Intraocular Lens implantation (Implantable Collamer Lens, artiflex)
• cataract surgery.
• age of 20~90

Exclusion Criteria:

• history of previous ocular or intraocular surgery
• glaucoma or ocular hypertension, ocular infection, non-dry eye ocular inflammation, ocular allergy, autoimmune disease
• history of iris damage during ocular surgery or previous trauma
• wearing contact lenses during the study period
• presence of current punctal occlusion
• pregnancy, lactating women, and children