ALDEYRA THERAPEUTICS, INC. 2013 EQUITY INCENTIVE PLAN NOTICE OF STOCK OPTION GRANT

Name of Optionee:

Total Number of Shares:

Type of Option:

Exercise Price per Share:

Date of Grant:

Vesting Commencement Date:

Vesting Schedule:

Expiration Date:

Title:

Subject to all of the terms and conditions set forth in the Notice of Stock Option Grant, this Stock Option Agreement (the “Agreement”) and the Plan, the Company has granted you an option to purchase up to the total number of shares specified in the Notice of Stock Option Grant at the exercise price indicated in the Notice of Stock Option Grant.

All capitalized terms used in this Agreement shall have the meanings assigned to them in this Agreement, the Notice of Stock Option Grant or the Plan.

For all purposes applicable to this option, “Service” means your continuous service as an Employee or Consultant.

This option vests and becomes exercisable in accordance with the vesting schedule set forth in the Notice of Stock Option Grant.

In no event will this option vest or become exercisable for additional shares after your Service has terminated for any reason.

If your Service terminates because of your total and permanent disability, then this option will expire at the close of business at Company headquarters on the date 12 months after your termination date.

For all purposes under this Agreement, “total and permanent disability” means that you are unable to engage in any substantial gainful activity by reason of any medically determinable physical or mental impairment which can be expected to result in death or which has lasted, or can be expected to last, for a continuous period of not less than one year.

For purposes of this option, your Service does not terminate when you go on a military leave, a sick leave or another bona fide leave of absence, if the leave was approved by the Company in writing and if continued crediting of Service is required by applicable law, the Company’s leave of absence policy, or the terms of your leave. However, your Service terminates when the approved leave ends, unless you immediately return to active work.

If you go on a leave of absence, then the vesting schedule specified in the Notice of Stock Option Grant may be adjusted in accordance with the Company’s leave of absence policy or the terms of your leave. If you commence working on a part-time basis, the Company may adjust the vesting schedule so that the rate of vesting is commensurate with your reduced work schedule.

When you wish to exercise this option, you must notify the Company by filing the proper “Notice of Exercise” form at the address given on the form or, if the Company has designated a brokerage firm to administer the Plan, you must notify such brokerage firm in the manner such brokerage firm requires. Your notice must specify how many shares you wish to purchase. The notice will be effective when the Company receives it.

However, if you wish to exercise this option by executing a same-day sale (as described below), you must follow the instructions of the Company and the broker who will execute the sale.

If someone else wants to exercise this option after your death, that person must prove to the Company’s satisfaction that he or she is entitled to do so.

You may only exercise your option for whole shares.

When you submit your notice of exercise, you must include payment of the option exercise price for the shares that you are purchasing. To the extent permitted by applicable law, payment may be made in one (or a combination of two or more) of the following forms:

•       By delivering to the Company your personal check, a cashier’s check or a money order, or arranging for a wire transfer.

•       By delivering to the Company certificates for shares of Company stock that you own, along with any forms needed to effect a transfer of those shares to the Company. The value of the shares, determined as of the effective date of the option exercise, will be applied to the option exercise price. Instead of surrendering shares of Company stock, you may attest to the ownership of those shares on a form provided by the Company and have the same number of shares subtracted from the option shares issued to you.

•       By giving to a securities broker approved by the Company irrevocable directions to sell all or part of your option shares and to deliver to the Company, from the sale proceeds, an amount sufficient to pay the option exercise price and any withholding taxes. (The balance of the sale proceeds, if any, will be delivered to you.) The directions must be given in accordance with the instructions of the Company and the broker. This exercise method is sometimes called a “same-day sale.”

Prior to your death, only you may exercise this option. You cannot transfer or assign this option. For instance, you may not sell this option or use it as security for a loan. If you attempt to do any of these things, this option will immediately become invalid. You may, however, dispose of this option in your will or by means of a written beneficiary designation; provided, however, that your beneficiary or a representative of your estate acknowledges and agrees in writing in a form reasonably acceptable to the Company, to be bound by the provisions of this Agreement and the Plan as if such beneficiary of the estate were you.

Regardless of any marital property settlement agreement, the Company is not obligated to honor a notice of exercise from your former spouse, nor is the Company obligated to recognize your former spouse’s interest in your option in any other way.

The text of the Plan is incorporated in this Agreement by reference.

This Plan, this Agreement and the Notice of Stock Option Grant constitute the entire understanding between you and the Company regarding this option. Any prior agreements, commitments or negotiations concerning this option are superseded. This Agreement may be amended only by another written agreement between the parties.