| Cover | Oct. 21, 2021 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Oct. 21, 2021 |
| Entity File Number | 001-36080 |
| Entity Registrant Name | IVERIC bio, Inc. |
| Entity Central Index Key | 0001410939 |
| Entity Tax Identification Number | 20-8185347 |
| Entity Incorporation, State or Country Code | DE |
| Entity Address, Address Line One | Five Penn Plaza |
| Entity Address, Address Line Two | Suite 2372 |
| Entity Address, City or Town | New York |
| Entity Address, State or Province | NY |
| Entity Address, Postal Zip Code | 10001 |
| City Area Code | 212 |
| Local Phone Number | 845-8200 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common stock, par value $0.001 per share |
| Trading Symbol | ISEE |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | false |
