---
type: "Bill"
title: "A bill for an act relating to the practice of optometry. (Formerly HSB 64.) Effective date: 07/01/2020."
description: "A bill for an act relating to the practice of optometry. (Formerly HSB 64.) Effective date: 07/01/2020."
jurisdiction: "us/states/ia"
legislature: "Iowa General Assembly"
session: "2019-2020"
identifier: "HF 310"
citation: "Iowa HF 310 (2019-2020)"
classification: ["bill"]
subjects: ["contact lenses", "eye care", "eyes", "health-related professions", "optometry", "professional licensure", "professional licensure division", "professions"]
status: "enacted"
primary_sponsors: []
version_count: 4
action_count: 25
vote_count: 3
first_action: "2019-02-07"
last_action: "2020-06-29"
source: "openstates"
source_identifier: "ocd-bill/e68c676c-5b24-4657-8476-0f9ab320ba5a"
source_url: "https://www.legis.iowa.gov/legislation/billTracking/billHistory?billName=HF 310&ga=88"
source_hash: "e2c2f4a402ae4202db1c7d59ee0c66bcb815f7f4e87646486e94b25b4863d68a"
vintage: "2026-07-01"
source_snapshot: "https://data.openstates.org/daily/2026-07-01/public.pgdump"
retrieved_at: "2026-07-06"
confidence: "reported"
tags: ["legislation", "bill", "us-ia"]
---

# Iowa HF 310 (2019-2020) — A bill for an act relating to the practice of optometry. (Formerly HSB 64.) Effective date: 07/01/2020.

## Version chain

The bill's text revisions, in order — the diff chain from filing to enrollment.

1. **Introduced** (filed) — [source](https://www.legis.iowa.gov/docs/publications/LGI/88/attachments/HF310.html)
2. **Amendment H-8065** (committee substitute) — [source](https://www.legis.iowa.gov/docs/publications/AMDI/88/H8065.pdf)
3. **Amendment S-5039** (committee substitute) — [source](https://www.legis.iowa.gov/docs/publications/AMDI/88/S5039.pdf)
4. **Enrolled** (enrolled) — [source](https://www.legis.iowa.gov/docs/publications/LGE/88/attachments/HF310.html)

## Votes

- Shall the bill pass? — **87–9** (pass) · lower
- Shall the bill pass? — **41–8** (pass) · upper
- Shall the bill pass? — **91–6** (pass) · lower

## Timeline

The legislative action history — every referral, reading, and vote.

- **2019-02-07** Introduced, placed on calendar. `introduction`
- **2019-02-26** Passed House, yeas 87, nays 9. `passage`
- **2019-02-26** Immediate message.
- **2019-02-27** Message from House.
- **2019-02-27** Read first time, referred to State Government. `reading-1`
- **2019-03-06** Subcommittee: Miller-Meeks, Chapman, and Lykam.
- **2019-03-25** Subcommittee reassigned: Miller-Meeks, Chapman, and Giddens.
- **2019-03-26** Subcommittee Meeting: 03/27/2019 12:00PM Senate Lobbyist Lounge.
- **2020-01-30** Subcommittee reassigned: R. Smith, Giddens, and Schultz.
- **2020-02-05** Subcommittee reassigned: R. Smith, Schultz, and T. Taylor.
- **2020-02-10** Subcommittee Meeting: 02/12/2020 8:45AM Senate Lobbyist Lounge.
- **2020-02-12** Subcommittee recommends amendment and passage.
- **2020-02-27** Committee report, recommending amendment and passage. `committee-passage`
- **2020-02-27** Amendment S-5039 filed. `amendment-introduction`
- **2020-03-03** Amendment S-5039 adopted. `amendment-passage`
- **2020-03-03** Passed Senate, yeas 41, nays 8. `passage`
- **2020-03-03** Immediate message.
- **2020-03-03** Message from Senate.
- **2020-03-03** Senate amendment H-8065 filed.
- **2020-06-03** House concurred in Senate amendment H-8065.
- **2020-06-03** Passed House, yeas 91, nays 6. `passage`
- **2020-06-03** Immediate message.
- **2020-06-04** Message from House.
- **2020-06-16** Reported correctly enrolled, signed by Speaker and President, and sent to Governor.
- **2020-06-29** Signed by Governor. `executive-signature`

## Source

OpenStates / OpenCivicData bulk snapshot [2026-07-01](https://data.openstates.org/daily/2026-07-01/public.pgdump); origin `ocd-bill/e68c676c-5b24-4657-8476-0f9ab320ba5a`. Confidence: reported (aggregated from official Iowa legislature records).