diff --git a/examples/BUILD.bazel b/examples/BUILD.bazel
index 2f618b26..1db7ad4c 100644
--- a/examples/BUILD.bazel
+++ b/examples/BUILD.bazel
@@ -72,7 +72,7 @@ proto_library(
         "option_duration_range.proto",
         "option_enum_allow_values.proto",
         "option_enum_disallow_values.proto",
-        "option_field_ignore_empty.proto",
+        "option_field_ignore.proto",
         "option_field_presence.proto",
         "option_field_skip_validation.proto",
         "option_map.proto",
diff --git a/examples/option_field_ignore.proto b/examples/option_field_ignore.proto
new file mode 100644
index 00000000..860df568
--- /dev/null
+++ b/examples/option_field_ignore.proto
@@ -0,0 +1,51 @@
+// Copyright 2023 Buf Technologies, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+syntax = "proto3";
+
+import "buf/validate/validate.proto";
+
+service ProfileService {
+  rpc CreateProfile(CreateProfileRequest) returns (CreateProfileResponse);
+  rpc UpdateProfile(UpdateProfileRequest) returns (UpdateProfileResponse);
+}
+
+message CreateProfileRequest {
+  string name = 1 [(buf.validate.field).required = true];
+  string email = 2 [
+    (buf.validate.field).string.email = true,
+    // If email field is left empty, it's not validated.
+    (buf.validate.field).ignore = IGNORE_EMPTY
+  ];
+  string description = 3;
+}
+
+message UpdateProfileRequest {
+  uint64 id = 1;
+  // The following fields are optional as this is an update request.
+  optional string name = 2;
+  optional string email = 3 [
+    (buf.validate.field).string.email = true,
+    // `IGNORE_DEFAULT` is used here:
+    // If this field is unpopulated, we don't validate it as an email.
+    // If this field is populated and is set to the empty string (the default
+    // value), it is also ignored. This is to allow users to unset their emails.
+    (buf.validate.field).ignore = IGNORE_DEFAULT
+  ];
+  optional string description = 4;
+}
+
+message CreateProfileResponse {}
+
+message UpdateProfileResponse {}
diff --git a/examples/option_field_ignore_empty.proto b/examples/option_field_ignore_empty.proto
deleted file mode 100644
index 1fb85e13..00000000
--- a/examples/option_field_ignore_empty.proto
+++ /dev/null
@@ -1,36 +0,0 @@
-// Copyright 2023 Buf Technologies, Inc.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-syntax = "proto3";
-
-import "buf/validate/validate.proto";
-
-service FeedbackService {
-  rpc SubmitFeedback(SubmitFeedbackRequest) returns (SubmitFeedbackResponse);
-}
-
-message SubmitFeedbackRequest {
-  // feedback is the content of feedback to submit.
-  string feedback = 1;
-  // email is the email.
-  string email = 2 [
-    // `ignore_empty` skips validation on a field if it's empty.
-    // The email will be not validated if it's empty.
-    (buf.validate.field).ignore_empty = true,
-    // `string.email` validates that a string field is a valid email.
-    (buf.validate.field).string.email = true
-  ];
-}
-
-message SubmitFeedbackResponse {}
diff --git a/examples/option_number_allow_values.proto b/examples/option_number_allow_values.proto
index 79daad23..0605bbad 100644
--- a/examples/option_number_allow_values.proto
+++ b/examples/option_number_allow_values.proto
@@ -23,8 +23,8 @@ service CarService {
 
 message SearchCarRequest {
   optional fixed32 number_of_seats = 1 [(buf.validate.field) = {
-    // `ignore_empty` skips validation if the field isn't set.
-    ignore_empty: true,
+    // `IGNORE_EMPTY` skips validation if the field isn't set.
+    ignore: IGNORE_EMPTY,
     fixed32: {
       // `in` requires that the value must be one of the specified values.
       // In this case, it validates that the number of seats is either 5 or 7.
diff --git a/examples/option_number_range.proto b/examples/option_number_range.proto
index 5613d5c1..d548a19d 100644
--- a/examples/option_number_range.proto
+++ b/examples/option_number_range.proto
@@ -37,7 +37,7 @@ message CreateReviewRequest {
 message CreateReviewResponse {
   // aggregated_review is the aggregated review after this one in request is created.
   // This value is empty if there are less than a 100 reviews submitted.
-  AggregatedReview aggregated_review = 1 [(buf.validate.field).ignore_empty = true];
+  AggregatedReview aggregated_review = 1 [(buf.validate.field).ignore = IGNORE_EMPTY];
 }
 
 message AggregatedReview {
diff --git a/examples/option_string_match_pattern.proto b/examples/option_string_match_pattern.proto
index 1bac8a72..a8f0216f 100644
--- a/examples/option_string_match_pattern.proto
+++ b/examples/option_string_match_pattern.proto
@@ -29,7 +29,7 @@ message UserProfile {
       // must match it.
       pattern: "^(\\+\\d{1,2}\\s)?\\(?\\d{3}\\)?[\\s.-]\\d{3}[\\s.-]\\d{4}$",
     },
-    ignore_empty: true,
+    ignore: IGNORE_EMPTY,
   }];
   // `hostname` specifies that the field value must be a valid hostname as defined
   // by [RFC 1034](https://tools.ietf.org/html/rfc1034#section-3.5).
@@ -43,7 +43,7 @@ message UserProfile {
     // defined by [RFC 3986](https://tools.ietf.org/html/rfc3986#section-3).
     // (buf.validate.field).string.uri_ref = true,
     (buf.validate.field).string.uri = true,
-    (buf.validate.field).ignore_empty = true
+    (buf.validate.field).ignore = IGNORE_EMPTY
   ];
   // `ip` specifies that a string field must be a valid ip address, in either v4 or v6.
   string last_login_at = 6 [(buf.validate.field).string.ip = true];