






Smile The Medical A DX
Eye drops containing Vitamin A that repair fatigue caused by dryness and overuse from the cornea
For these people and situations
Product Overview
Smile The Medical A DX is a product in the Smile DX series by Lion Corporation. It contains the maximum amount of corneal repair ingredient “Vitamin A (Retinyl palmitate)” within standards (50,000 units), penetrates damaged corneal cells to promote hyaluronic acid production, supporting corneal repair. It also promotes mucin production to stabilize tears, retain moisture, and help care for eye fatigue caused by dryness and overuse (Method Patent No. 5549669).
Mild formula with no cooling agents (level 0) that minimizes stinging sensation, making it easy to use even for sensitive eyes. Contains no preservatives (such as benzalkonium chloride) and uses Lion’s unique technology to ensure preservative effects. Please consult a doctor, pharmacist, or registered seller if you have any questions.
Product Features
Repairs cornea with maximum amount of Vitamin A
Retinyl palmitate 50,000 unitsContains the maximum amount of Vitamin A within standards. Penetrates damaged corneal cells to promote hyaluronic acid production and supports corneal repair (Method Patent No. 5549669).
Retains tears and keeps moisture
Mucin production promotionPromotes production of mucin, which stabilizes tears, retains moisture on the eyes, and continuously cares for eye fatigue caused by dryness and overuse from the cornea.
No cooling agents added; mild formula that doesn’t sting
Cooling sensation level 0Mild type with no cooling agents and a cooling sensation level of 0. Designed for those whose eyes sting easily, those with sensitive eyes, or those who dislike cooling sensations.
Preservative-free
Lion’s unique preservative effect technologyNo preservatives such as benzalkonium chloride or potassium sorbate are added; Lion’s unique technology ensures preservative effects. Expiration date and storage methods are the same as for eye drops containing preservatives.
Active ingredients (per 100mL)
| Ingredient name | Content amount | Classification of action |
|---|---|---|
| Retinyl palmitate (Vitamin A) | 50,000 units | Corneal repair |
| Chondroitin sulfate ester sodium | 0.1g | Corneal protection |
| Taurine | 1g | Metabolism promotion |
Efficacy and Effects
Usage and Dosage
| Amount per application | Number of times to apply per day |
|---|---|
| 1 to 3 drops | 3 to 6 times |
・Do not let the tip of the container touch your eyes, eyelids, or eyelashes (this can cause contamination or foreign matter intrusion). Do not use if the solution is cloudy.
・Do not use while wearing soft Contact lenses.
・Contains high-viscosity ingredients. Vision may temporarily appear blurry after use, so please be careful.
・For ophthalmic use only.
Smile DX Series Comparison
| Comparison items | 【Smile The Medical A DX】 |
Smile 40 Premium DX |
Smile 40 MediClear DX |
Smile The Medical A DX Contact |
|---|---|---|---|---|
| Classification | Class 3 OTC Drug | Class 2 OTC Drug | Class 2 OTC Drug | Class 3 OTC Drug |
| Main target symptoms | Dryness, fatigue from overuse, blurriness | Eye fatigue, blurriness, redness, itching | Itching, redness, blurriness | Dryness, fatigue from overuse, blurriness |
| Vitamin A content | 50,000 units (maximum amount) | 50,000 units (maximum amount) | 10,000 units | 50,000 units (maximum amount) |
| Number of active ingredients | 3 types | 10 types | 7 types | 4 types |
| Anti-inflammatory & redness relief ingredients | None | Epsilon-aminocaproic acid & tetrahydrozoline hydrochloride | Berberine chloride hydrate & dipotassium glycyrrhizinate (herbal-derived W) | None |
| Corneal protective ingredients | Chondroitin sulfate ester sodium | Chondroitin sulfate ester sodium | None | Chondroitin sulfate ester sodium |
| Cooling sensation | Level 0 (Mild, non-stinging) | Level 4 (Cool) | Level 4 (Cool) | Level 0 (Mild, non-stinging) |
| Use while wearing Contact lenses | Hard lenses only | Hard lenses only | Hard lenses only | Compatible with all Contact lenses (except colored CL) |
| Preservative | Additive-free | Additive-free | Additive-free | Additive-free |
| For these users | For those whose main concerns are dryness and fatigue and are looking for eye drops that do not sting | For those concerned about eye fatigue, blurriness, redness, and itching | For those with particularly strong itching and redness | For those who want to easily apply eye drops while wearing Contact lenses |
🌱 Brand Story
Lion Corporation’s "Smile" is an ophthalmic medicine brand long loved in Japan. Lion established the "Corneal Research Institute" and has accumulated unique research on the cornea, the key to eye health. The DX series is based on the concept of "healing from the cornea," developing Lion’s unique vitamin A penetration formula (patent method No. 5549669) that enhances vitamin A absorption into the cornea. It is an ophthalmic medicine series packed with years of research, featuring a unique technology that provides high preservative effects without adding preservatives.
- Consult a doctor, pharmacist, or registered seller before use: If you are receiving medical treatment. If you have had allergic reactions to medicines. If you have severe eye pain. If you have been diagnosed with glaucoma.
- If you experience rash, redness, itching, eye redness, itching, swelling, stinging, or pain after use, stop immediately and consult a doctor, pharmacist, or registered seller.
- If eye blurriness does not improve, or if symptoms do not get better after about two weeks of use, stop using and consult a doctor, pharmacist, or registered seller.
- Do not use while wearing soft Contact lenses.
- Because it contains high-viscosity ingredients, your vision may temporarily appear blurry after use.
- Do not let the tip of the container touch your eyes, eyelids, or eyelashes. Do not use if the solution is cloudy.
- Avoid direct sunlight and store in a cool place as much as possible.
- Keep out of reach of children.
- Do not transfer to other containers (this may cause misuse or change the quality).
- Do not use products past their expiration date.
- Please use as soon as possible after opening.


















































































