The Hyper-CL™ lenses are indicated for therapeutic use as a bandage to protect the corneal surface and to relieve corneal pain in the treatment of acute or chronic ocular pathologies, such as bullous keratopathy, corneal erosions, entropion, corneal edema, and corneal dystrophies as well as post-surgical conditions resulting from cataract extraction and corneal surgery. The lenses may be prescribed for daily wear with removal for cleaning and disinfection (chemical, not heat) prior to reinsertion, as recommended by the eye care professional.

In addition Hyper-CL™ contact lenses can also provide optical correction during healing if required.

This study is a prospective, randomized crossover study. The primary aim of this study is to assess the safety and effectiveness of using the Hyper-CL™ lens +salt solution (5% NaCl) as compared with using regular contact lens + salt solution (5% NaCl) in subjects suffering from corneal edema. Safety will be assessed by evaluating the rate of adverse events and adverse device effects occurred throughout the study period. Effectiveness will be assessed by measuring changes in corneal thickness and visual acuity.

Subjects with corneal edema will be the study population. Only subjects who have signed the informed consent form and meet all the eligibility criteria listed below will be qualified for enrollment. The study will encompass a total of up to 80 subjects who will complete the Protocol follow-up schedule.

Each subject will be treated with:

Treatment A: Hyper-CL™ lens + salt solution + antibiotics drops (7 days) Treatment B: Regular soft contact lens +salt solution+ antibiotics drops (7 days) One week (7 days) of washout without any treatment will be between treatments. Subject will be equally allocated to one of the following 2 crossover regimen based on a randomization scheme with blocks stratified by center: A-B; B-A

Inclusion Criteria:

1. Subject is over 18 years old
2. Subject with corneal edema in the visual access
3. Subject with visual acuity of 6/20 or worse (equivalent ETDRS) clinically explained by corneal edema
4. Subject understands the study requirements and the treatment procedures and provides written Informed Consent before any study-specific tests or procedures are performed.

Exclusion Criteria:

1. Subject with active Herpes keratitis
2. Subject with scarred cornea
3. Subject who is suffering from erosions and/or infections of the cornea (red eye)
4. Subject with glaucoma shunts (e.g. Ahmed valve) and or bleb
5. Subject who require chronic administration of any topical ophthalmic beside lubrication eye drops and steroids or anti glaucoma drags
6. Subject who is currently participating or have participated in an investigational study, other than this study, within the past 60 days